Open Up Resources Unit 4 Test Review

Front

What makes a graph proportional?

Back

A graph is proportional if it is a straight line that passes through the origin (0,0).

Front

If 30 kids in the class like grape juice, how many kids like pineapple juice if the ratio is 3:4?

Back

40 kids like pineapple juice.

Front

What is the ratio of sweaters to pogo sticks sold if the store sold a total of 20 items in the ratio of 2:3?

Back

The store sold 12 pogo sticks.

Front

What is the constant of proportionality if a car travels 90 miles in 2 hours?

Back

The constant of proportionality is 45 miles per hour.

Front

Is the graph of the equation y = 2x + 3 proportional or non-proportional?

Back

Non-proportional, because it does not pass through the origin.

Front

What does a tape diagram represent in a ratio problem?

Back

A tape diagram visually represents the parts of a ratio and their relationships.

Front

How do you find the total number of items sold if given a ratio and total?

Back

Add the parts of the ratio, divide the total by that sum, then multiply by each part.

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio.

Front

What is the formula for finding the constant of proportionality?

Back

Constant of proportionality = y/x, where y is the dependent variable and x is the independent variable.

Front

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

Back

It means the graph does not represent a constant ratio and does not pass through the origin.