Rates and Unit Rates

A sixth-grade math teacher can grade 25 homework assignments in 20 minutes. Is he working at a faster rate or slower rate than grading 36 homework assignments in 30 minutes?

• Slower rate

• Faster rate

• He didn't grade them

• Everyone got 100

Christina biked 36 miles in 6 hours. If she biked at a constant speed, how many miles did she ride in one hour?

• 6 mph

• 216 mph

• 30 mph

• 42 mph

Joshua drove 90 miles on 15 gallons of gas. Find the unit rate.

• 0.17 mpg

• 135 mpg

• 6 mpg

• 75 mpg

Ilana made $45 babysitting for 6 hours. How much does she make per hour?

• $75 per hour

• $7.50 per hour

• $270 per hour

• $2.70 per hour

Rose spent $2.00 for 20 pieces of gum. Joe spent $1.50 for 10 pieces of gum. Who got the better deal?

• Joe

• Rose

• Mrs. Hoyme

• William

Jack jumps 40 times per 4 minutes.  How many times does he jump per 1 minute?

• 5

• 10

• 40

• 36

An airplane on autopilot took 6 hours to travel 4,164 kilometers.  What is the unit rate for kilometers per hour?

• 496 km/hr

• 469 km/hr

• 649 km/hr

• 694 km/hr

A 6-pound bag of wildflower seed covers 15 square feet.  How many pounds of seed does it take to cover 1 square foot?

• 4

• 0.4

• 90

• 9

A stores sells 12 cans of beans for $27.  What is the price of 7 cans of beans?

• $15.75

• $84

• $13.25

• $2.25

If 8 pencils cost $5.20, what is the unit price of the pencils?

• $0.56

• $0.65

• $1.06

• $0.40