Connecting Proportional Relationships and the Equation

Craig earns extra money as a lifeguard. He earns $37 for 4 hours and $64.75 for 7 hours.  What is the constant of proportionality? 

• $37
• $64.75
• $9.25
• $18.50

What does k represent in the equation y = kx?

• constant rate of change
• constant of proportionality
• the equation
• x/y

Does this equation represent a proportional relationship?

• Yes
• No

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 constant of proportionality?

• 1/3
• 3
• 6
• 1/6

Which statement below accurately represents the graph?

• $100 is earned for each hour worked
• $100 is earned for every 2 hours worked
• $500 is earned for every 8 hours worked
• $200 is earned for every 3 hours worked

Joel earns $40 for shoveling snow on two driveways. Which equation correctly shows the  money (m) he earns per driveway (d)?

• d = 40m
• m = 40d
• m = 20d
• d = 20m

Write an equation for this situation: The cost of renting a car is $20 per day.

• y=20x
• y=10x
• y=20x
• y=10x

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3
• Yes; 3
• Yes; 5
• No

What is the total cost of tickets if there are 7 adults?

• $600
• $75
• $500
• $525