章节大纲

  • lesson content

    A map of a neighborhood block shows the corner of Brown Street and Smith Street. There is a house on the map marked with a black dot. The  coordinates  of this house need to be plotted correctly for the City Planner.
    ::附近街区的地图显示布朗街和史密斯街的拐角。 地图上有一栋房屋有黑点标记。 这栋房屋的坐标需要为市政规划员正确绘制。

    In this concept, you will learn how to determine the coordinates of a point on a  coordinate grid .
    ::在此概念中,您将学会如何确定坐标网格坐标点的坐标。

    Coordinate Grid
    ::坐标网格

    coordinate grid  is a graph used to locate points in space. A pair of numbers, called  coordinates , tells where the point is in two-dimensional space. 
    ::坐标网格是用于定位空间点的图表。一对数字,称为坐标,表示点在二维空间的位置。

    Here is an example of a coordinate grid.
    ::以下是坐标网格的例子。

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    The  horizontal axis , or the line that goes across side to side, is called the  x axis . The  vertical axis , or the line that goes up and down, is called the  y axis . The point where the two axes meet is called the  origin .  The origin has the value of (0,0).
    ::水平轴,或横向对面的线,称为 x 轴。垂直轴,或向上和向下线,称为 y 轴。两个轴相交的点称为源。起源值为 0,0。

    Every line on the  x  axis has a different value. The values start at 0 at the origin and continue on the horizontal axis. Each line has a value of 1. Every line on the  y  axis has a different value. The values start at 0 with the origin and continue on the vertical axis. Each line has a value of 1.
    ::x 轴上的每条线都有不同的值。值从 0 开始,然后在水平轴上继续。每条线的值为 1 。Y 轴上的每条线都有不同的值。值从 0 开始,然后在垂直轴上继续。每条线的值为 1 。

    When a point has already been plotted on a coordinate grid, an  ordered pair  identifies its location. A coordinate is written in the form of an  ordered pair.  In an ordered pair, there are two numbers put inside a set of  " data-term="Parentheses" role="term" tabindex="0"> parentheses . The first number is an  x  value and the second number is a  y  value  ( x , y )
    ::当一个点已经绘制在坐标网格上时, 定购一对确定位置。 坐标以定购一对的形式写成。 在定购一对中, 将两个数字放在一组括号内。 第一个数字是 x 值, 第二个数字是 y 值( x, y ) 。

    Here is an example of an ordered pair:
    ::以下是一对定购夫妇的例子:

    (3, 4)

    This ordered pair has two values. It has an  x  value of 3 because the  x  value comes first. It has a  y  value of 4. Each ordered pair represents one point on a coordinate grid.
    ::这对定购夫妇有两个值。 它的 x 值为 3 , 因为 x 值先到 。 它的 Y 值为 4 。 每个定购夫妇代表坐标网格上的一个点 。

    This ordered pair can be plotted on the coordinate grid.
    ::这对定单夫妇可以在坐标网格上绘制。

    To graph (3,4) on the grid, start at the origin and count three units on the  x  axis first. Then working from the 3, count up four since the  y  coordinate is four. That is where the point is plotted.
    ::在网格上的图( 3, 4) 中, 首先从原点开始, 然后在 x 轴上数三个单位。 然后从 3 开始工作, 数四个, 因为 y 坐标是 4 。 这是绘制点的位置 。

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    Sometimes, the ordered pair contains a zero, for example:
    ::有时,定购的一对含有零,例如:

    (0, 4)

    This means that the  x  value is zero, so you don’t move along the  x  axis for your first point, instead you start counting up at zero. The  y  value is four, so you count up four units from zero.
    ::这意味着 x 值为 0, 这样您就不会在第一个点的 x 轴上移动, 而是开始以零计数 。 y 值为 4, 所以从零数为四个单位 。

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    The point actually falls directly on the  y  axis.
    ::点实际上直接落在 y 轴上。

    Examples
    ::实例

    Example 1
    ::例1

    Earlier, you learned about a neighborhood map that shows a point of a house on the block.
    ::早些时候,你了解到一个街区地图 显示一栋房子在街区的一角。

    The city planner needs the coordinates of that house. 
    ::城市规划员需要那栋房子的坐标

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    First, locate the point on the coordinate grid. There is only one point on this grid, so it is easy to identify.
    ::首先, 定位坐标网格上的点。 这个网格上只有一个点, 所以很容易识别 。

    Next, look at where that point is located on the  x  axis. This map does not label values on each axis, so you will have to count out from the origin to determine the value. The  x  value is 2.
    ::下一步,请看该点位于 x 轴上的位置。本地图不为每个轴上标注值,因此您必须从源数中点出以决定值。 x 值为 2。

    Then, look at where the point is located on the  y  axis. Again, there is no label for values on the map, so count up from the origin. The  y  value is 3.
    ::然后, 看看点位于 y 轴上的位置 。 同样, 地图上也没有值标签, 所以从源数上点数。 y 值为 3 。

    The answer is (2,3). This is the coordinate pair for the house on the map.
    ::答案是(2,3) 这是地图上房子的坐标对

    Example 2
    ::例2

    Graph (9,3) on the coordinate grid.
    ::坐标网格上的图(9,3)

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    First, look at the  x  value in the ordered pair. The value is 9. This is the value on the horizontal axis. Starting at the origin, count across the horizontal axis to 9.
    ::首先,看看订购对的 x 值。 值为 9 。 这是水平轴上的值。 从起始点开始, 横跨水平轴数到 9 。

    Next, look at the  y  value. The value is 3. Starting at the 9 on the  x  axis, count up 3 units.
    ::下一步,看看 y 值。 值是 3 。 从 x 轴上的 9 开始, 计数为 3 个单位 。

    Then, mark the coordinate pair on the grid with a dot.
    ::然后在网格上用点标上坐标对

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    The answer goes on (9, 3) where the dot is.
    ::答案继续(9,3),点的位置。

    Use the coordinate grid to answer the following questions.
    ::使用坐标网格回答下列问题。

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    Example 3
    ::例3

    What is the ordered pair for point A?
    ::A点的订货配对是什么?

    First, locate the point on the coordinate grid.
    ::首先,定位坐标网格上的点

    Next, follow down to the  x  axis and write down the  x  value in the ordered pair.
    ::下一步, 跟随到 x 轴, 并写下定购一对中的 x 值 。

    Then, follow from the point over to the  y  axis and write down the  y  value in the ordered pair.
    ::然后,从点到 y 轴,写下 y 值。

    The answer is (3,2)
    ::答案是(3,2)

    Example 4
    ::例4

    What is the ordered pair for point B?
    ::B点的订货配对是什么?

    First, locate the point on the coordinate grid.
    ::首先,定位坐标网格上的点

    Next, follow down to the  x  axis and write down the  x  value in the ordered pair.
    ::下一步, 跟随到 x 轴, 并写下定购一对中的 x 值 。

    Then, follow from the point over to the  y  axis and write down the  y  value in the ordered pair.
    ::然后,从点到 y 轴,写下 y 值。

    The answer is (4,6)
    ::答案是(4,6)

    Example 5
    ::例5

    What is the ordered pair for point C?
    ::C点的订货配对是什么?

    First, locate the point on the coordinate grid.
    ::首先,定位坐标网格上的点

    Next, follow down to the  x  axis and write down the  x  value in the ordered pair.
    ::下一步, 跟随到 x 轴, 并写下定购一对中的 x 值 。

    Then, follow from the point over to the  y  axis and write down the  y  value in the ordered pair.
    ::然后,从点到 y 轴,写下 y 值。

    The answer is (7,9)
    ::答案是(7,9)

    Review
    ::回顾

    Write the coordinates of each point.
    ::写下每个点的坐标 。

    lesson content

    1. A
      ::A A A
    2. B
      ::BB ,B
    3. C
      ::C 中 C
    4. D
      ::D D
    5. E
      ::英 英 英
    6. F
      ::F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F
    7. G
      ::G 级
    8. H
      ::赫 时
    9. I
      ::一一
    10. J
      ::J J
    11. K
      ::K K 级
    12. L
      ::L L L

    Graph and label each point on the coordinate grid.
    ::在坐标网格上标明每个点的图表和标签。

    1. M(1, 3)
      ::M(1,3)
    2. N(2, 4)
      ::N(2,4)
    3. O(0, 6)
      ::O(0, 6)
    4. P(8, 6)
      ::P(8)、P(8)、P(6)
    5. Q(2, 2)
      ::问题(2,2,2)
    6. R(4, 7)
      :伤心R4(4,7))
    7. S(7, 7)
      ::S(7,7)
    8. T(9, 0)
      ::T(9,0)
    9. U(4, 6)
      ::U(4,6)
    10. V(0, 5)
      ::VV(0, 5)
    11. W(6, 8)
      :伤心W6,8)
    12. Y(1, 7)
      :伤心1, Y1, 7)
    13. Z(3, 4)
      ::Z(3,4) Z(3,4)

    Review (Answers) 
    ::回顾(答复)

    Click   to see the answer key or go to the Table of Contents and click on the Answer Key under the 'Other Versions' option.
    ::单击可查看答题键, 或转到目录中, 单击“ 其他版本” 选项下的答题键 。

    Resources
    ::资源