Constant of Proportionality Verbal Descriptions

Jimmy was going on vacation. His parents drove the first day and went 390 miles in 6 hours. The next day they drove for 8 hours and went 520 miles. What was their constant rate of speed? 

• 65 miles∕1hr
• 60miles∕1hr
• 40miles∕1hr
• 50miles∕1hr

You can buy 36 cookies for $4. What is the unit rate (in cookies per dollar)?

• 4 cookies per dollar
• 6 cookies per dollar
• 9 cookies per dollar
• 1/9 dollars per cookie

Rachel has 3 tanks with 234 fish. How many fish are in each tank?

• 75

• 49

• 78

• 33

Jimmy was going on vacation. His parents drove the first day and went 390 miles in 6 hours. The next day they drove for 8 hours and went 520 miles. What was their constant rate of speed? 

• 65 miles∕1hr
• 60miles∕1hr
• 40miles∕1hr
• 50miles∕1hr

The distance that an automobile travels varies directly as the time it travels. If the car travels 280 miles in 7 hours, how far will it travel in 12 hours?

• 480
• 1960
• 84
• 25

A 6-ounce package of fruit snacks contains 45 pieces. How many pieces would you expect in a 10-ounce package?

• 75 Pieces
• 27-ounces
• 27 pieces
• 75-ounces

12 ounce shampoo bottle lasts Mike 16 weeks.  How long would you expect an 18-ounce bottle of the same brand to last him?

• 24 weeks
• 6 weeks
• 30 weeks
• 20 weeks

Sean traveled by car at a constant rate. After 4 hours, she had traveled 272 miles. Which verbal description represents the relationship between the distance traveled and the hours of driving?

• Sue is traveling 136 miles for 2 hours

• Sue is traveling 68 miles per hour

• Sue is traveling 68 hours per mile

• Sue is traveling 136 hours for 2 miles

Michelle reads 15 pages for 30 minutes.

Determine the rate of change.

• 2 pages per minute

• 2 minutes per page

• 1/2 pages per minute

• 1/2 minutes per page

The cost of 6 pounds of almonds is $23.28. What is the constant of proportionality that relates y, the cost in dollars, to x, the number of pounds?

• $3.88 per pound

• 3.88 pounds per $

• $1.55 per pound

• 1.55 pounds per $