Proportions Unit 5 Test Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Front

How do you find the unit rate from a total cost and quantity?

Back

Divide the total cost by the quantity to find the cost per unit.

Front

What does a map scale represent?

Back

A map scale shows the relationship between distance on the map and actual distance in the real world.

Front

If a map scale is 1 inch = 10 miles, how far apart are two cities that are 3.5 inches apart on the map?

Back

35 miles (3.5 inches x 10 miles/inch = 35 miles).

Front

What is the formula to calculate the price per gallon of gas?

Back

Price per gallon = Total cost / Number of gallons.

Front

If it costs $46.80 to fill a 13-gallon gas tank, what is the price per gallon?

Back

$3.60 ($46.80 / 13 gallons = $3.60 per gallon).

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

Cross-multiply the terms and then solve for the unknown variable.