2.3 Slope & Slope Intercept Form

Finding Slope

100

Find slope, m, at (6, 5) and (5,4).

What is 1?

200

Find slope, m, at (3,1) and (8,4).

What is 3/5?

300

Find slope, m, at (1,1) and (6,10).

What is 9/5?

400

Find slope, m, at (2,5) and (3,9).

What is 4?

500

Find slope, m, at (-3,6) and (-3,4).

What is undefined? (cannot divide by 0)

Writing Equations in Slope-Intercept Form

100

Write an equation in slope-intercept form: (5, -1); slope = 1/5

What is y = 1/5x - 2?

200

Write an equation in slope-intercept form: (5,2); slope = 2

What is y = 2x - 8?

300

Write an equation in slope-intercept form: (4, 5) and (-2, 8)

What is y = -1/2 x + 7?

400

Write an equation in slope-intercept form: (-1, 1) and (-4,4)

What is y = -1x or -x?

500

Write an equation in slope-intercept form: (3,7) and (-3, 3)?

What is y = 2/3x + 5?

Graphing in Slope-Intercept Form

100

Graph y = -4/5x + 3.

Check student whiteboards for (5,-1) and (0,3).

200

Graph y = 2x - 1.

Check student whiteboards for (0,-2), (1,1), (2,2), or (-1, -3).

300

Graph y = -2x + 3

Check student whiteboards for (0,3), (1,1), (2, -1), or (3,-3).

400

Graph y = -3/4x + 3

Check student whiteboards for (0,3) and (4,0).

500

Graph y = 3x + 2

Check student whiteboards for (0,2), (1,5), (2,8), (-1,-1), or (-2,-4).

Standard Form

100

Graph:

3x + 7y = 21

Look for (7,0) and (0,3)

200

Graph

4x - 7y = -28

Look for (-7,0) and (0,4)

300

11x - 22y = -44

Look for (-4,0) and (0,2)

400

Write the equation in slope-intercept form.

-5x + 4y = 20

y=5/4x+5

500

Write the equation in slope-intercept form.

10x + 3y = -7

y=10/3x-7/3