Unit 3 Review

Identify slope and y -intercept

100

Y = 4x + 10 

slope = 4 

Y. int = 10 

200

Y = -2x - 5 

Slope = -2 

Y int. = -5 

300

2/3x + 5 = y 

Slope = 2/3x 

Y int. = 5 

400

-6/3 - 9/2x = y 

Slope = -9/2x

Y int. = -6/3

500

Y = 4 

Slope = None 

Y int. = 4 

Write an equation

100

Slope = 3 

Y int. = 4

Y = 3x +4 

200

Slope = 1/2 

Y Int. = -1 

y = 1/2x -1

300

Y int. = -5 

Slope = 3/4x 

y = 3/4x - 5 

400

Slope = (3,3) (0, -5) 

Y int. = -5 

Y = 8/3x - 5 

500

Slope = (2,2) (-1, -4) 

Y int. = -2

Y = 2x -2

Find points on a line

100

Y = 6x + 8                              

( -1 , 2 ) ( 1 , 2 ) ( -2 , -1) 

(-1, 2 ) 

200

Y = -5x - 6 

(4, 20) (3,-21) (5,1) 

(3, -21) 

300

2x + 4y = 20 

(8,16) (5,0) (0,5) 

(0, 5) 

400

-4x + 5y = -7 

( 6, 2 ) ( 3, 1 ) (-3, 1)

( 3, 1 )

500

 10x +5y = 5

( 0, 1)  (-½, 2) (1, 1) 

 (-½, 2)

Find the slope

100

(2,4) (1,0) 

4 

200

(-4, 1) (2,4) 

1/2 

300

(-3,3) (3,-5) 

-4/3 

400

(2,2) (-1,-4) 

2 

500

(3,3) (0,-5) 

8/3

Misc.

100

What is the slope of a line representing 

Change in Y over the change X (Rise/Run) 

200

What is the formula for finding slope? 

Y2 - Y1 

_______

X2 - X1 

300

Write the basic equation all linear equations follow 

y = mx + b 

400

See slides 

y = 4 

500

See slides 

x = -4