Proportional Relationships Test Review: TPA

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 solve a proportion?

Back

To solve a proportion, cross-multiply the two fractions and set the products equal to each other.

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant value (k) that relates two proportional quantities, often represented as y = kx.

Front

Back

y = 12.

Front

Lisa bought 7 boxes of cookies for $28.00. How much would 10 boxes of cookies cost?

Back

x = 40.

Front

What does it mean if a graph shows a proportional relationship?

Back

It means that the graph is a straight line that passes through the origin (0,0).

Front

Does the graph show a proportional relationship? (Graph not shown)

Back

No.

Front

What is the formula for finding the constant of proportionality?

Back

The formula is k = y/x, where y is the dependent variable and x is the independent variable.

Front

If Luis bought 6 bags of candy for $12.00, what is the constant of proportionality?

Back

The constant of proportionality is 2.

Front

What is the relationship between the number of phone lines (l) and the total cost (c) if the cost of 1 phone line is $50?

Back

The relationship is proportional, and the equation is c = 50l.