Proportions, Conversions, & Scale Drawing Review

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how many units of one quantity correspond to one unit of another quantity.

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the total quantity of one item by the total quantity of another item, ensuring the second quantity is 1.

Front

If a store sees 120 customers in 8 hours, what is the unit rate in customers per hour?

Back

15 customers per hour.

Front

What is the formula to solve for x in a proportion?

Back

Cross-multiply the two ratios and set them equal to each other.

Front

If x/4 = 5/20, what is the value of x?

Back

x = 20.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or area that is proportional to the actual size, using a specific ratio.

Front

How do you find the scale factor in a scale drawing?

Back

Divide the dimensions of the drawing by the corresponding dimensions of the actual object.

Front

If Mr. Dulin runs 5 miles in 42 minutes, how do you find his speed in miles per minute?

Back

Divide the distance (5 miles) by the time (42 minutes) to find the speed.

Front

How long will it take Mr. Dulin to run 25 miles at his current speed?

Back

210 minutes.

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.