Proportionality Review

Which is a unit rate?

• $\frac{2\ birds}{1\ stone}$

• $\frac{1\ chicken}{2\ eggs}$

• $\frac{\left(1,000\ miles\right)}{\left(2,000\ hours\right)}$

• $\frac{\left(1\ km\right)}{\left(4,302\ hours\right)}$

Which is a unit rate?

• 3 miles per 1 hour

• 6 miles per 2 hours

• 1 mile per 2 hours

• 2 miles per 6 hours

There are 96 slices of bread in 8 loaves. There are an equal number of slices of bread in each loaf. How many slices of bread are in 4 loaves?

• There are 48 slices in 4 loaves.

• There are 3 slices in 4 loaves.

• There are 36 slices in 4 loaves.

• There are 12 slices in 4 loaves.

There are 48 slices of bread in 4 loaves. What is the unit rate?

• 24 slices in 2 loaves.

• 12 slices in 1 loaf.

• 1 slice in 0.083 loaves.

• 36 slices in 3 loaves.

The ratio of boys to girls in Mrs. Perez's class is 2 to 3. There are 18 girls in the class. What is the total number of students in Mrs. Perez's class.

• 30

• 12

• 45

• 27

The ratio of rabbits to rats at the pet store is 4 to 5. If there are 16 rabbits, how many rats are there?

• 20

• 36

• 9

• 25

A roll of caution tape has 12 feet in it. If 1 ft ~ 0.31 m, how many meters is the tape roll?

• 3.7 m

• 5.9 m

• 39 m

• 28 m

A worker uses 450 inches of string to make 300 bracelets of the same size. At this rate how many inches of string are needed to make 1 bracelet?

• 0.67 inches

• 0.07 inches

• 0.33 inches

• 1.5 inches

Bartholomew paid $200 for 5 microwaves. At this rate, how much did 1 microwave cost?

• $40 each

• $1,000 each

• $100 each

• $4.00 each

The ratio of pots to pans that Tamera owns is 2 to 3. If she has 8 pots, how many pans does she have?

• 12 pans

• 24 pans

• 16 pans

• 10 pans