CHAPTER 7

Question 1

Linear function

Answer 1

f(x) = mx + b

Question 2

y = mx + b

Answer 2

slope-intercept from

Question 3

zero

Answer 3

X intercept

Question 4

how to find x-intercept

Answer 4

-b/m

Question 5

m>0

Answer 5

increasing

Question 6

m<0

Answer 6

decreasing

Question 7

What happens when m = 0

Answer 7

no slope

Question 8

what happens when b = 0

Answer 8

intersects 0,0

Question 9

what happens when m and b = 0

Answer 9

x axis

Question 10

identity function

Answer 10

linear function defined by f(x)=x

Question 11

identity function denoted by

Answer 11

I

Question 12

analogous

Answer 12

similar

Question 13

f*f-1=

Answer 13

I

Question 14

Constant function

Answer 14

f(x)=b

Question 15

Directly proportional function

Answer 15

f(x)=kx

Question 16

constant of proportionality

Answer 16

in directly proportional function, k is nonzero and any real number of

f(x) = kx

Question 17

in directly proportional function, there is a zero. True of false

Answer 17

true

Question 18

What is the only zero in a directly proportional function

Answer 18

x=0

Question 19

average rate of change of f(x) = mx+b is _ over any interval on the x-axis and is the _

Answer 19

constant, slope

Question 20

difference quotient of linear function

Answer 20

slope

Question 21

standard form

Answer 21

Ax+By=C

B is nonzero

Question 22

point-slope form

Answer 22

y-y2=m(x-x2)

m is nonzero
x,y is a point
x2,y2 is another point