Unit 3 Review - Writing and Graphing Equations

Which letter represents the slope in the equation y = mx + b ?

• x

• y

• m

• b

In the following equation, what is the y-intercept?

y = -3x + 7

• (0,-3)

• (0,7)

• (0, -3/7)

• (0,3)

Determine the slope of the line.

• 3/2

• -3/2

• (0,-3)

• 3/2x

What type of slope does the graph have?

• Zero
• Undefined
• Negative
• Positive

Find the slope of the line that passes through (10, -8) and (1, 12).

• 20/9
• -20/9
• 4/9
• 9/4

Find the slope of the line that passes through the points (2, 4) and (6, 12)

• 1/2
• -1/2
• 2
• -2

A camp charges families a fee of $625 per month for one child and a certain amount more per month for each additional child. Use the graph to write an equation in slope-intercept form to represent the amount a family with x additional children would pay.

• y = 625x + 225
• y = 225x 
• y = 225x + 625
• y =  625

A fitness club opens with 80 members. Each month the membership increases by 15 members. Which equation represents the relationship between the number of months the club has been opened, x, and the total fitness club membership, y?

• y=15x
• y=15x+80
• y=x+15
• y=80x+15

What is the equation of this line?

• x = 0

• x = -2

• y = 0

• y = -2

Write in slope intercept form
5x - 3y = -9

• y = 5/3x - 3
• y = 5/3x + 9
• y = 5/3x + 3
• y = 3/5x + 3