Homework #14

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 in dollars per hour? 

• $37 / hour

• $64.75 / hour

• $9.25 / hour

• $18.50 / hour

The constant of proportionality can be found by finding the __________  _____________.

• unit rate
• ratio rate
• proportion answer
• rational number

Write an equation for this relationship.

• y=18x
• y=18.50x
• y=22.50x
• y=22x

What is the constant of proportionality of the graph above?

• 0
• 1/6
• 60
• 10

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

• 102 words per minute
• 100 words per minute
• 400 words per minute
• 412 words per minute