Scale Factor and Proportions

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to enlarge or reduce figures in geometry.

Front

What does it mean for a table to be proportional?

Back

A table is proportional if the ratio between the quantities in the table remains constant.

Front

If the scale factor is greater than one, what happens to the figure?

Back

The figure is enlarged.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities where one of the quantities is expressed as one unit.

Front

How do you calculate the actual distance using a scale?

Back

Multiply the distance on the map by the scale factor to find the actual distance.

Front

What is the scale factor if a figure is reduced to half its size?

Back

The scale factor is 0.5.

Front

What is an enlargement in terms of scale drawings?

Back

An enlargement is when a scale drawing is larger than the original figure.

Front

What is a reduction in terms of scale drawings?

Back

A reduction is when a scale drawing is smaller than the original figure.

Front

How do you express $12 for 5 boxes of cereal as a unit rate?

Back

$2.40 per box.

Front

What is the formula for finding the scale factor?

Back

Scale Factor = New Size / Original Size.