Functions Review

What is the y-intercept of the line with the equation 4y = -3x + 10? (HINT: SOLVE FOR Y FIRST!)

• (0, -3/4)

• (0, 10)

• (0, -3)

• (0, 5/2)

What is the slope of the line with the equation 2y = 10x + 5?
(HINT: SOLVE FOR Y FIRST!)

• 10

• 5

• 5/2

• 8

A plumber charges $25 for a service call plus $50 per hour of service. Write an equation in slope-intercept form for the cost, C, after h hours of service.

• C = 25 + 50h

• C = 50 + 25h

• H = 25 + 50c

• H = 50 + 25c

Compare the rates of change. Which statement is true about functions A and B?

• They have the same rate of change

• A has a greater rate of change than B

• A and B both have negative rates of change

• A has a negative ROC and B has a positive ROC

• How many minutes she was on the phone

• What Tara pays per minute

• Tara's base fee for her phone service

• How much Tara owes at the end of each month

The cost of Nate’s service is described by y = 4x + 6. The table shows the cost of Beth’s service. Which service is cheaper for 8 movies in one month?

• Beth's service ($38 vs. $40) is cheaper

• Nate’s service ($42 vs. $44) is cheaper

• Nate’s service ($38 vs. $40) is cheaper

• Beth's service ($42 vs. $44) is cheaper

Which statement matches the graph?

• Taylor can write 6 words per minute

• Taylor can write 25 words per minute

• Taylor can write 50 words per minute

• Taylor can write 150 words per minute

What is the slope of a vertical line?

• 0

• undefined

• depends on what points the line passes through

• 1

What is the slope in the picture?

• Positive

• Negative

• Zero

• Undefined

What is the slope in the picture?

• Positive

• Negative

• Zero

• Undefined