Proportional Tables

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 is constant.

Front

How can you tell if a relationship is proportional in a table?

Back

Divide y by x; if the result is constant for all pairs, the relationship is proportional.

Front

What does it mean if a table is proportional?

Back

It means that as one quantity increases, the other quantity increases at a constant rate.

Front

What is the unit rate?

Back

The unit rate is the amount of one quantity per one unit of another quantity.

Front

How do you find the unit rate from a total cost?

Back

Divide the total cost by the number of units to find the cost per unit.

Front

If 3 pounds of apples cost $3.60, what is the cost per pound?

Back

$1.20 per pound.

Front

What is the formula to check for proportionality in a table?

Back

y = kx, where k is a constant.

Front

What does it mean if a table is not proportional?

Back

It means that the ratio of y to x is not constant.

Front

If the cost of 7 adult tickets is $525, what is the cost of one ticket?

Back

$75 per adult ticket.

Front

What is the first step to determine if a relationship is proportional?

Back

Look for a consistent ratio between the x and y values.