Ratios and Proportions Review

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.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a proportion?

Back

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

Tags

CCSS.7.RP.A.2A

Front

How do you find the constant of proportionality?

Back

The constant of proportionality can be found by dividing the dependent variable by the independent variable in a proportional relationship.

Tags

CCSS.7.RP.A.2B

Front

What does it mean for a table to be proportional?

Back

A table is proportional if the ratio of the values in one column to the values in another column remains constant.

Tags

CCSS.7.RP.A.2A

Front

If y = kx, what does k represent?

Back

In the equation y = kx, k represents the constant of proportionality.

Tags

CCSS.7.RP.A.2B

Front

What is the equation of a line that passes through the origin and has a slope of 3?

Back

The equation is y = 3x.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

If a table shows the relationship between miles run and calories burned, how can you determine if it is proportional?

Back

Check if the ratio of calories burned per mile is constant.

Tags

CCSS.7.RP.A.2A

Front

What is the constant of proportionality in the equation y = 14x?

Back

The constant of proportionality is 14.

Tags

CCSS.7.RP.A.2B

Front

How do you write an equation from a proportional table?

Back

Identify the constant of proportionality and use it to write the equation in the form y = kx.

Tags

CCSS.7.RP.A.2C

Front

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 28 girls?

Back

There are 21 boys.