Proportional Relationships

Front

Does this graph show a proportional relationship?

Back

Yes

Front

What is a unit rate?

Back

A rate in which the second quantity is 1

Front

The cost of 3 tickets to the concert is $27. Write an equation to show the total cost, y, based on purchasing x tickets.

Back

y = 9x

Front

Another term used for constant of proportionality is

Back

unit rate

Front

Based on the graph what is the unit rate?

Back

6 feet per minute

Front

What is a proportional relationship?

Back

A relationship where two quantities increase or decrease at the same rate.

Front

If y is directly proportional to x, what is the equation form?

Back

y = kx, where k is the constant of proportionality.

Front

What does the constant of proportionality represent?

Back

It represents the ratio of y to x in a proportional relationship.

Front

How do you find the unit rate from a ratio?

Back

Divide the first quantity by the second quantity.

Front

If 5 apples cost $10, what is the unit rate?

Back

$2 per apple.