答复 - Cch 3: 两种变量的线性等同和不平等
Section outline
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Section 3.2 The Coordinate Plane
::第3.2节 协调计划Review
::回顾-
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A = (5, 1)
::A=(5,1) -
B = (2, 0)
::B=(2,0) -
C = (-2, -4)
::C = (-2, 4) -
Quadrant II
::二次四方会议 -
Quadrant IV
::第四四四大四国 -
Quadrant III
::四方三 -
Quadrant I
::四方一
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Answers will vary. Examples: (-1, 5) & (2, -5)
::答复将各有不同,例如-1,5)和(2,5)和(2,5)
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A rectangle
An irregular pentagon
::矩形 一个非常规的五角形 -
a) across the x-axis = (3, -2), across the y-axis = (-3, 2), about the origin = (-3, -2)
b) across the x-axis = (-4, 3), across the y-axis = (4, -3), about the origin = (4, 3)
c) across the x-axis = (-2, 0), across the y-axis = (2, 0), across the origin = (2, 0)
::a) 横横x轴=(3,2)横横Y轴=(3,2),横横x轴=(3,2),跨x轴=(3,2),跨x轴=(4,3),跨Y轴=(4,3),跨x轴=(4,3,3),跨x轴=(4,3,c),跨x轴=(2,0),横Y轴=(2,0),跨源=(2,0) -
a) Russia b) Argentina
:a) 俄罗斯b) 阿根廷
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a) (-2, 3) b) (-5, -4) c) (4, -1)
:a) (-2,3) b) (5, 4, c) (4, 1)
Section 3.3: Linear Models
::第3.3节:线性模型Review
::回顾-
Non-linear
::非线性 -
Linear
::线性 -
Linear
::线性 -
Linear
::线性 -
Non-linear
::非线性 -
Linear
::线性 -
Linear
::线性 -
Non-linear
::非线性 -
Linear
::线性 -
Non-linear
::非线性
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Linear
::线性 -
Linear
::线性 -
Linear
::线性 -
Linear, then non-linear
::线性, 然后非线性 -
hours total =
hours = 1 hour and 40 minutes
::= 123小时= 1小时40分钟
Section 3.4 Finding the Slope of a Line
::第3.4节 找出线的曲线Review
::回顾-
Slope =
::斜坡=42=2 -
Slope =
::斜坡 = -26=-13 -
Slope = 0
::斜坡=0 -
Slope = undefined
::斜缩 = 未定义 -
Slope = -5
::斜坡 = -5 -
m =
::m = - 62=-3 -
m =
::m=05=0 -
m =
::m = -4-12=13 -
m =
undefined
::m=50=未定义 -
m =
::m = 4-10=-25
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m =
*without reducing slope fraction, so more answers are possible
::m = -2-b1-a=12;b=-3;a=-1 * 不减少坡度分数,因此可以有更多的答案 -
Slope =
%. No
::斜坡=430=13.3%。 -
Slope =
. Yes, since it is less than 0.3.
::斜坡=4150.2667。是的,因为它小于0.3。 -
Slope =
::斜坡=111
Section 3.5: Finding the Equation of a Line in Slope-Intercept Form
::第3.5节:在斜坡-截取形式中找到线的公式Review
::回顾-
y = 2x + 3
::y = 2x + 3 y = 2x + 3 -
::y=14x+2.6 y=14x+2.6 -
::y=-52x-5 -
::y=x+2 y=x+2 -
::y=-34x+312 y=-34x+312 -
::y=12x+112 -
::y=35x-4 -
Green line:
::绿线:y=-5x+14 -
Blue line:
::蓝线:y=3x+10 -
Red line:
::红线: Y=- 34x-514 -
Purple line:
::紫线: Y=16x-816
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a) y = 5, b) y = b
::a)y=5,b)y=b -
::y=2,98945-y10-5x+2,98945 -
c = 140.55x
::c = 140.55x -
::vf=250+21.937t -
. In 2017,
%
::y=3.25x3. 2017年,3.25'(14)+3=48.58%
Section 3.6: Other Forms of the Equation of a Line
::第3.6节: " 线形 " 的其他形式Review
::回顾-
::y+5=2(x- 3) -
::y+3=12(x-6) -
or
::y-2=-32(x+1)或y+7=-32(x-5) -
or
::y+3=15(x-5)或y+5=15(x+5) -
::-3x+2y=12 -
::3x+y=12 3+y=12 -
::2x+3y=12 -
::-4x+y=0 -
::y=- 45x+4 y=- 45x+4 -
::y=-32x+9
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a)
b)
c)
for both. No, the point does not matter.
::a) y-5=-(x+1),b)y=-(x-4),c)y=-x+4。 -
a)
, b) A = -1, B = 2, C = -8; -x+2y = -8
:a) Y=-ABx+CB,b) A=-1, B=2, C=-8; -x+2y=-8
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a) 50x + y = 100,500. b) x = 2,180
:a) 50x+y=100 500.b)x=2 180
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y - 300 = -55(x+0)
::y - 300 = - 55(x+0) -
0.05x + 60 = 165; $2,100
::0.05x + 60 = 165; 2 100美元
Section 3.7: Horizontal and Vertical Lines
::第3.7节:水平线和垂直线Review
::回顾-
y = 3
::y = 3 y = 3 -
x = -2
::x = -2 -
x = 1
::x=1x=1 -
y = 5
::y = 5 -
x = -6
::x = -6 = -6 -
y = -7
::y = - 7 y = - 7 -
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On x-axis, y = 0; on y-axis, x = 0
::在 X 轴上, y = 0; 在 Y 轴上, x = 0 -
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Section 3.8: Graphing a Line by Making a Table of Values
::第3.8节:通过绘制数值表绘制线条图Review
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a)
b) 31.5 Euros
c) $55
:a) (b) 31.5欧元c) 55美元
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(Note the vertical axis is in thousands.)
:注意垂直轴以千计。 )
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Section 3.9: Graphing a Line by Finding the Intercepts
::第3.9节:通过查找拦截线绘制线条Review
::回顾Explore More
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Value after 3 years = $14,000. It will be worth $17,500 after 2.5 years.
::3年后的价值=14 000美元,2.5年后价值17 500美元。 -
The intercepts equal the amount to invest to get $162.50 in interest, by investing in only one or the other fund.
::拦截量等于投资达到162.50美元的利息,只投资于一个或另一个基金。 -
Intercepts = 100%, 10 hours
::拦截=100%,10小时 -
;
::y=-5.4x1 000+初始温度;y=-3.3x1 000+初始温度
Section 3.10: Graphing a Line by Using a Point and the Slope
::第3.10节:用点和斜坡绘制线Review
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points: (1,990, 75), (2,005, 77); slope:
::点数1 990 75),(2 005 77);斜度:215
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48 bags
::48袋
Section 3.11: Parallel Lines
::第3.11节:平行线Review
::回顾-
Yes, they are parallel.
::是的,它们是平行的。 -
No, they are not parallel.
::不,它们不是平行的。 -
No, they are not parallel.
::不,它们不是平行的。 -
Yes, they are parallel.
::是的,它们是平行的。 -
y = -2
::y = - 2 y = - 2 -
x = 1
::x=1x=1 -
or
or
::y- 5=- 13( x+3) 或 Y=- 13x+4 或 x+3y= 12 -
or
or
::y-7=1(x- 4) 或y=x+3 或 -x+3 或 -x+y=3 -
or
or
::y- 3=2( x-1) 或 y= 2x+1 或 - 2x+1 或 - 2x+y=1 -
or
or
::y+10=16(x+18)或y=16x-7或 -x+6y=-42
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or
or
::y- 14=2( x-3) 或 - 2x+y=8 或 Y= 2x+8 -
x = 53 ft and 4 inches tall
::x = 53英尺和4英寸高 - $16.10
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No, the sides are not parallel.
, , ,
::不,两边不平行。 mAB=4, mCD=3, mAD=18, mBC=14
Section 3.12: Perpendicular Lines
::第3.12节:直直线Review
::回顾-
Perpendicular
::心眼 -
Parallel
::平行平行 -
Perpendicular
::心眼 -
Neither
::中 无 -
or
or
::y+2=-14(x+6) 或 x+4y=-14 或 Y=-14x-312 -
or
or
::y - 5= 3(x- 4) 或 - 3x+y=-7 或 y= 3x-7 -
or
or
::y-7=-(x- 4) y=- x+11 或 x+y= 11 -
or
or
::y - 4= 13( x+12) 或 - x+3y= 24 或 y= 13x+8 -
::y=9岁 -
or
or
::y+10=-6(x- 3) 或 6x+y=8 或 Y=-6x+8
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blue line:
, purple line:
; perpendicular
::蓝线:y=x+1,紫线:y=x+7;垂直 -
,
; perpendicular
::毫正=33=1, 内阴性{ text{-}33=-1; 垂直 -
::y=-ABx+CB, m=-AB和mBA -
Yes, since two sides are perpendicular to each other, and thus form a right angle.
, , (AC and AB are perpendicular.)
::是,因为两侧相互垂直,因此形成一个右角。 mAB=44=1, mBC=62=3, mAC=22=1(AC和AB是垂直。 ) -
or or
::y- 0= 23(x- 0) 或 y= 23x 或 - 2x+3y= 0
Section 3.13: Graphing Linear Inequalities of Two Variables
::第3.13节:绘制两个变量线性不平等图Review
::回顾-
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::y>-52x+2 -
::x% 3 -
::yx-6 -
::y>5x- 5
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. Answers will vary. Options include: 17 washer & 0 refrigerators; 16 washers & 1 refrigerator; 14 washers & 2 refrigerators.
::y-613x+10013. 答案会有所不同。 选项包括: 17个洗衣机和0个冰箱; 16个洗衣机和1个冰箱; 14个洗衣机和2个冰箱。 -
If
represents the coffee at $9 per pound, and
represents the coffee at $7 per pound:
::如果x代表每磅9美元的咖啡,y代表每磅7美元的咖啡: -
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Answers will vary. Options include: 40 daytime minutes & 0 night time; 200 nighttime & 0 daytime; and 60 each.
::答案会有所不同。 选项包括: 40 日间分钟和 0 夜间; 200 夜间和 0 日间; 以及 每人 60 个 。 -
::10A+4C < 5,000美元
Section 3.14: Graphing Absolute Value Functions
::第3.14节:绝对值函数图Review
::回顾1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
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The absolute value function that represents this situation is
, where x is your sea level before diving. By graphing this function, you can see that the vertex occurs at the point (90, 0).
::表示此状态的绝对值函数是 yx- 90 , x 是潜水前的海平面。通过图形化此函数,您可以看到顶点( 90, 0) 发生于点( 90, 0) 。 -
One has vertex at (-1, 0), and the other at (0, 1).
::一个在(-1,0)有顶点,另一个在(0,1)有顶点。 -
Yes. Explanations will vary since there is no shift. A reflection across y would be the same. Also, the stretch/shrink for horizontal/vertical changes would equal the same sets of points.
::是的,解释会因没有变化而有所不同。横跨y的反射将是相同的。此外,横向/纵向变化的拉伸/缩小将等于相同的一组点数。
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