Ratio Review

Oliver sent 72 text messages in 9 minutes. What is the unit rate?

How many messages did he send in one minute?

• 5 messages per minute

• 8 messages per minute

• 6 messages per minute

• 72 messages per minute

Which ratio is expressed as a unit rate?

• $1.00 per pound

• 1 page per 3 minutes

• 16 inches per 16 seconds

• 67 miles per 60 minutes

The table shows how some lengths in inches are related to their equivalent lengths in centimeters.

What number is missing from the last row of the table?

• 177.8

• 73.5

• 101.6

• 88.9

Answer explanation

When you come across questions like this, you need to "scale back" or find how many for one. Than it will be easier to find the ratio with different numbers.

Which of the following shows a table of equivalent ratios?

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Janet works at a grocery store and she can scan 60 items in 2 minutes.

At that rate, approximately how long would it take her to scan 200 items?

• approximately 30 minutes

• approximately 7 minutes

• approximately 3 minutes

• Cannot be determined by the information given.

The table shown represents pairs of values that form equivalent y:x ratios.

Which table uses the same ratio as the ratio in the table above?

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Lincoln's Laundromat has 3 washers and 3 dryers. Each washer and dryer set runs 10 loads a day.

What is the rate of loads done at Lincoln's Laundromat each day?

• 30 loads per day

• 30 loads

• 10 loads

• 10

The Hurricanes are trying to break a 352 homerun record.

During the first 16 games of the season they have hit 64 homeruns. If they continue to hit homeruns at the same rate, how many more games will it take them to tie the record?

• 18

• 88

• 12

• 72

A freight train traveled 80 miles in 5 hours at a constant speed, as shown in the graph below.

How many miles did the freight train travel per hour?

• 20 miles per hour

• 16 miles per hour

• 15 miles per hour

• 5 miles per hour

It takes Bob 29 seconds to sharpen one pencil.

At this rate, how many minutes will it take Bob to sharpen 30 pencils?

• 29.00 minutes

• 15.00 minutes

• 14.50 minutes

• 14.02 minutes