Topic 2 Review (3rd)

Front

What is a ratio?

Back

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

Front

If the ratio of apples to oranges is 3:4, how many oranges are there if there are 15 apples?

Back

20

Front

What is a proportion?

Back

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

Front

Solve the proportion: 4/8 = x/16. What is x?

Back

8

Front

On a map, if 1 inch equals 10 miles, how do you find the actual distance between two points?

Back

Multiply the number of inches on the map by 10.

Front

If two cities are 7 inches apart on a map where 1 inch equals 10 miles, what is the actual distance?

Back

70 miles

Front

What is the constant of proportionality?

Back

The constant of proportionality is the factor that relates two proportional quantities.

Front

If a basketball team has won 143 games and lost 11 games, what is the constant of proportionality of wins to losses?

Back

13

Front

How do you find the constant of proportionality in a distance and time relationship?

Back

Divide the distance by the time to find the miles per hour.

Front

If a jet aircraft flies 410 miles in 12 hours, what is the constant of proportionality?

Back

410 : 12 miles.