Proportions WS

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if their cross products are equal.

Front

What are cross products?

Back

Cross products are the products of the numerator of one ratio and the denominator of the other ratio.

Front

Do the ratios 12/16 and 2/4 form a proportion?

Back

No, they do not form a proportion.

Front

Do the ratios 9/12 and 27/36 form a proportion?

Back

Yes, they form a proportion.

Front

What is the first step to check if two ratios are proportional?

Back

Calculate the cross products of the two ratios.

Front

Back

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio.

Front

What is an example of proportional quantities?

Back

If the ratio of distance to time is constant, then speed is proportional to distance.

Front

What is the relationship between the ratios 18/32 and 9/16?

Back

They are proportional.