4.1 Ratio, Rates, & Unit Rates

Which ratio is written INCORRECTLY?

• 3 to 4

• 3/4

• 3 and 4

• 3:4

A ratio...

• is a comparison of 2 amounts.

• compares different amounts that have different units.

• compares an amount to one.

A rate...

• is a comparison of 2 amounts.

• compares 2 amounts with different units.

• compares an amount to one.

A unit rate...

• compares 2 amounts.

• compares 2 amounts with different units.

• compares an amount to one.

The speed limit is 70 miles per hour on US-131. This is an example of which of the following?

• ratio

• rate

• unit rate

In 2018 it took Desiree Linder 2 hours 39 minutes and 54 seconds to run the 26 mile Boston Marathon. This is an example of which of the following?

• ratio

• rate

• unit rate

If you have 3 pennies, 4 nickels, and 5 dimes which represents the following ratio: nickels to total number of coins?

• 4 to 8

• 8 to 4

• 4 to 12

• 12 to 4

On a map, if one centimeter represents 25 kilometers, how many kilometers does 7 centimeters represent?

• 175

• 3.57

• 32

• 18

Mr. Keys made $90 in 5 hours. How much money was made in 1 hour?

• 95

• 85

• 450

• 18

Find the unit rate of $97.50 for 15 pizzas.

• $12.00

• $6.50

• $82.50

• $15.00