Chapter 1 Review: Proportional Relationships

Front

What does the equation y=3x represent in a proportional relationship?

Back

It represents that for every 1 hour (x), Ms. Dolan travels 3 miles (y).

Front

If Ms. Dolan travels 15 miles, how many hours did it take her?

Back

5 hours.

Front

What is the equation to represent the distance traveled y, in terms of the number of gallons x if Aniyah's car can travel 228 miles on 6 gallons of gas?

Back

y=38x.

Front

What is the constant of proportionality in a proportional relationship?

Back

It is the ratio of y to x, often denoted as k.

Front

How do you find the constant of proportionality k?

Back

k = y/x (y divided by x).

Front

What does it mean if a table of values is proportional?

Back

It means that the unit rate (the ratio of y to x) is constant.

Front

What is the unit rate if the number of trees and apples is not constant?

Back

The table is not proportional because the unit rate is not constant.

Front

If y=38x, what does this tell you about the relationship between y and x?

Back

For every gallon of gas (x), Aniyah's car travels 38 miles (y).

Front

What is a proportional relationship?

Back

A relationship where the ratio between two quantities is constant.

Front

What does it mean for a graph to pass through the origin in a proportional relationship?

Back

It indicates that when x=0, y is also 0, showing a direct relationship.