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What are the directions
Find the Slope
Directions
(Movement of slope)
Slope-Intercept Form
Two variable problems
100

y = 2x + 1

Explain how to graph this equation.

Start at (0,1) 

up 2, right 1

100
(5, 7) and (3, 6)
What is 1/2?
100

A slope of 2.

What is move 2 units up and one unit right?

100
Write an equation in slope-intercept form when slope = 3 and the y-intercept is 2
What is y = 3x + 2?
100

2x + 4y = 12

(8,-1)


YES! 

2(8) + 4(-1) = 12

16-4 = 12 

12=12 

200

y = -2/3x - 7

Explain how to graph this equation.

Start at (0,-7). For the slope move down 2 and 3 to the right. 

200
(2, 5) and (8, 1)
What is -2/3?
200

A slope of -5.

What is move 5 units down and one unit right?

200
Write in slope-intercept form: slope = 1/4; y-intercept = -6
What is y = 1/4 x - 6?
200

 -5x + 3y = 15

(-3,1)

NO! 

-5(-3) + 3(1) = 15

15 + 3 = 15

18 ≠ 15

300

y = 6/7x - 5

Explain how to graph this equation.

Start at the origin. Move down 5 on the y-axis. For the slope move up 6 and 7 to the right. 
300
y = -3x - 2
What is -3?
300

m = 7/8

What is move seven units up and eight units right?

300
Identify the slope: y = -5/2 x - 3/4
What is -5/2?
300

Elizabeth Middle School is selling tickets for the winter musical. Adult tickets cost $5 each and child tickets cost $3 each. Write an equation that would model the total dollars made by the school from selling tickets

5(a) + 3(c) = S

a: adult tickets sold

c: child ticket sold

S: total money made from sales

400

4x + y = 8

Explain how to graph this equation. 

Start at the origin. Move up 8 on the y-axis. For the slope move down 4 and 1 to the right. 

400

y= 7

What is 0?

400

m = -0.75.

What is move 3 units down and 4 units right?

400
Identify the y-intercept: y = 3/4 - 2
What is -2?
400

What would y equal if x is 4

5x - 2y = 14

y = 3

5(4) - 2(y) = 14

20 - 2(y) = 14

20 - [ 6 ]  = 14

2 x [ 3 ] = 6

500

2x + 4y = 12

Explain how to graph this equation.

Start at the origin. Move up 3 on the y-axis. For the slope move down 1 and 2 to the right. 

500

x=3

What is undefined 

500

y = -9x + 3

What is move 9 units down and 1 unit right from positive 3?

500
Write in slope-intercept form: slope = 2; (3, 5)
What is y = 2x -1?
500

is (12,11) a solution?

-x - y = -1

No!

- (12) - (11) = -1

-12 - 11 = -1

-23 ≠ -1