Ratios, Rates, and Proportions 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

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as speed (miles per hour) or price per item.

Front

What is a proportion?

Back

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

Front

How do you find the actual length of an object using a scale?

Back

Multiply the length of the object in the drawing by the scale factor.

Front

If a car's length is 3 cm on a scale of 1 cm:4 ft, what is the actual length?

Back

12 feet.

Front

How do you calculate earnings per lawn if you earned $96 for mowing 8 lawns?

Back

Divide the total earnings by the number of lawns: $96 ÷ 8 = $12.

Front

What is the ratio of comedies to action movies if 20 comedies were rented and the ratio is 4:3?

Back

15 action movies were rented.

Front

How do you find the height of an object using similar triangles?

Back

Set up a proportion using the heights and shadow lengths of the objects.

Front

If a 20 ft tall sign casts a 25 ft shadow, what is the height of a sign that casts a 15 ft shadow?

Back

12 ft.

Front

What is the constant of proportionality (k) in the equation k = y/x?

Back

It represents the ratio of y to x, showing how y changes with respect to x.