11/18 8TH gRADE

8.4B Unit Rates

by Cynthia Santa Ana

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Since 15 is not on the graph, the best is to find the unit rate first. What operation is used to find unit rate?

• Addition

• Subtraction

• Multiplication

• Division

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So lets find the unit rate.

$$Unit\ Rate\ =\ \frac{y}{x}\ =\frac{Width}{Books}$$

• 0.8 inches to each book

• 1.25 inches to each book

• 1 inch to each book

Multiple Choice

A book shelf contains 15 books that have the same width.

Which graph best models the width of each book?

The combined width for all 15 books is 12 inches.

Multiple Choice

A bus travels 25 miles in 30 minutes.

Which graph has a slope the best represents the number of miles per minute the bus travels?

Here is one those questions to where unit rate has to be found first.

Multiple Choice

A student traveled a distance of 68 miles in 136 minutes. Which graph has a slope that best represents this rate?

Multiple Choice

At a restaurant, 600 customers were served during a 10 hour period of time.

Which graph has a slope that best represents the number of customers served per hour at this restaurant?

Multiple Choice

The cost for 6 pencils at a store is 30 cents. Each pencil has the same cost.

Which graph best represents the cost of each pencil at this store?

Multiple Choice

Oscar buys his lunch in the school cafeteria. The cost of 15 school lunches is $33.75.

Which slope has the graph that best represents the average cost of lunches in dollars per lunch?

Multiple Choice

A bottle contains 30 fluid ounces of orange juice and 18 fluid ounces of pineapple juice.

Which graph has a slope that best represents the ratio of orange juice to pineapple juice in this bottle?