Renna Copy of Proportional Relationships

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total amount by the number of units. For example, if you spend $40 on 5 pounds of concrete, the unit rate is $40 ÷ 5 = $8 per pound.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

If 3 cookies cost $2.00, how much do 15 cookies cost?

Back

To find the cost of 15 cookies, set up a proportion: 3 cookies / $2 = 15 cookies / x. Solving gives x = $10.

Front

What is the formula to calculate the unit rate?

Back

Unit Rate = Total Amount / Number of Units.

Front

How do you determine if a table of values represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of corresponding values are constant.

Front

If Samantha earned $90 for 6 hours of work, what is her hourly rate?

Back

To find the hourly rate, divide total earnings by hours worked: $90 ÷ 6 = $15 per hour.

Front

What does it mean if a relationship is non-proportional?

Back

A non-proportional relationship means that the ratio between two quantities is not constant.

Front

How can you solve for x in a proportion?

Back

Cross-multiply the terms in the proportion and then solve for x. For example, if a/b = c/x, then a*x = b*c.

Front

What is the significance of the constant of proportionality?

Back

The constant of proportionality is the ratio that describes how one quantity changes in relation to another in a proportional relationship.