a)

f−1(x) = x−2012

$f^{–1}\left(x\right)=\frac{x–20}{12}$

b)

f−1(x) = x+54

$f^{–1}\left(x\right)=\frac{x+5}{4}$

c)

f−1(x) = x+2012

$f^{–1}\left(x\right)=\frac{x+20}{12}$

d)

f−1(x) = x+512

$f^{–1}\left(x\right)=\frac{x+5}{12}$

a)

y = 2x + 6

b)

2x – y = 6

c)

y = 2x – 6

d)

y = 2x – 2

a)

-0.87

b)

-0.15

c)

0.84

d)

0.13

a)

y = –3x – 2

b)

y = –3x + 4

c)

y = –3x + 10

d)

y = –3x

a)

$37.75

b)

$29.75

c)

$0.16

d)

$47.60

a)

working

b)

sleeping

c)

studying

d)

eating

a)

y = 4

b)

y = 2

c)

x = 2

d)

x = 4

a)

y = –3x + 6

b)

y = 13x − 2

$y=\frac{1}{3}x–2$

c)

y = 3x – 6

d)

y = 13x + 2

$y=\frac{1}{3}x+2$

a)

when the slopes are opposite

b)

when the slopes are equal

c)

when the slopes are positive

d)

when the product of the slopes is –1

a)

a line that has a slope greater than 1.

b)

a line that connects all the data points.

c)

a line that might best estimate the data and be used for predicting values.

d)

a vertical line halfway through the data.

a)

257

b)

182

c)

173

d)

180

a)

b)

c)

d)

a)

y – 2x = 11

b)

2x + y = 14

c)

y = 2x + 14

d)

2x – y = –14

a)

less than 50

b)

between 80 and 65

c)

between 65 and 50

d)

greater than 80

a)

y = 12x

$y=\frac{1}{2}x$

b)

y= −12x

$y=–\frac{1}{2}x$

c)

y = 12x − 4

$y=\frac{1}{2}x–4$

d)

y = 2x – 10