Unit 2 Review

Vocabulary

100

What is b in y=mx+b?

y-intercept

200

Another name for x-values

Domain

300

Name this form

Ax+By=C

Standard Form

400

Slope formula

(y2-y1)/(x2-x1)

500

Point-slope formula

y-y1=m(x-x1)

Functions/Relations

100

Function or not?

(-2,3) (-1,3) (8,4) (11,2)

Yes

200

List the domain of the relation

{(-1,-9), (0,-5), (4,3), (6,-2)}

{-1,0,4,6}

300

When using the vertical line test to determine if a relation is a function, what must happen?

The line must not touch the graph of the relation in more than one pint

400

Function or Not a function? Explain why. 

x          y

1          2

2          5

3          8

4          11

Function, the x-values do not repeat

500

List the domain and range then determine if the relation is a function.

{(5,2), (-3,4), (5,-6), (8,0)}

D= {-3,5,8}

R={-6,0,2,4}

not a function

Slope

100

Identify the slope of the linear equation

y=-x+6

m=-1

200

Find the slope of a line that passes through the points (0,5) and (2,10)

m=5/2 or 2.5

300

What is the slope of the linear function

y=14

m=0

400

Find the slope of a linear function that contains the points (-2,8) and (5,-13)

m=-3

500

What is the slope of the following equation?

9x+6y=-6

m=-3/2

Evaluating Functions

100

If f(x)= 2x+7, find f(-3)

f(-3)=1

200

Use f(x)=-5x-14, find f(-9)

f(-9)=31

300

Use g(x)=3x+19.

If g(x)=34, find x

x=5

400

Use f(x)=-5x-14

Evaluate f(1)-f(-4)

-25

500

Use f(x)=-4x+9

Evaluate f(c+2)

f(c+2)=-4c+1

Miscellaneous

100

Describe the graph and what the slope equals for 

y=5

The line is horizontal, and the slope is zero.

200

Solve the equation for x:

2(x+3)=14

x=4

300

Solve for x:

20=5(-3+x)

x=35

400

Rewrite in slope-intercept form and then identify the slope and y-intercept

-5x+3y=-15

y=5/3x-5

m=5/3

b=-5

500

Use f(x)=-4x+1

If f(x)=53, find x.

x=-13