Graphing Linear Functions

Slope

100

This is the slope of a vertical line.

What is undefined?

200

A line that slants up to the right has this slope.

What is positive?

300

The slope of the line containing the points (-2, 1) and (4, -3).

What is -2/3?

400

Two ways to graph a slope of 5.

What is up 5 right 1, and down 5 and left 1?

500

Find the slope between (2, 3), (-2, -7)

 m = 4/3

Slope-Intercept Form

100

slope-intercept form

What is y=mx + b?

200

The slope and y-intercept of the graph of the equation y = -2x - 5.

What is a slope of -2 and y-intercept of -5?

300

Graph the equation y=1/3x+5

See graph. 

400

The first step in graphing an equation in slope-intercept form.

What is plotting the y-intercept?

500

Plotting a point at (0, 7) and rising -3 and running -1 gives you the line for this equation.

What is y = 3x + 7?

Miscellaneous

100

Solve:  -4x - 10 = 46

What is x = -14?

200

Write an equation for the following word problem:  McHenry County College charges a $20 technology fee for every 3 credit class.  How much does each credit cost if you spend $95 on a class?

What is 3x + 20 = 95?

300

Simplify:  8x - 2(3x - 3)

What is 2x + 6?

400

Graph using the slope and y-intercept:  

y = 3x - 2

slope = 3/1

y-intercept = (0,-2)

500

Graph.

3y + 6x = 21

See graph. 

True or False?

100

-2/-3 is the same as -2/3.

What is False?

200

A horizontal line has a slope of 0.

What is True?

300

The x-intercept of the graph of the equation y = 2x - 1 is -1.

False!

400

Slope can never be negative. 

False

500

y-y₁=m(x-x₁) is Point slope form. 

True!!!