Comparing Proportional Graphs

If two line graphs have the same slope, what can you conclude about their proportional relationship?

• They are directly proportional.

• They are inversely proportional.

• They are not proportional.

• Their relationship cannot be determined.

Which of the following graphs represents a proportional relationship?

• Graph A

• Graph B

• Graph D

• Graph C

In a proportional graph, what is the relationship between the independent and dependent variables?

• They have a random relationship.

• They vary inversely with each other.

• They are unrelated to each other.

• They vary directly with each other.

Which of the following statements is true about comparing proportional and non-proportional graphs?

• The points in a proportional graph lie on a straight line that passes through the origin.

• Non-proportional graphs always have a negative slope.

• Proportional graphs always have a positive slope.

• The points in a non-proportional graph lie on a straight line that passes through the origin.

The Bountiful Harvest Festival awarded Kimberly and her dad first prize for their garlic fries last year, so they're making them again this year. The key to their success is using fresh potatoes.

It takes Kimberly 4 minutes to peel each potato.

There is a proportional relationship between the number Kimberly peels, x, and the amount of time (in minutes) it takes to peel that many potatoes, y.

Graph this relationship.

Select two points to draw a line.

Who spends more per day?

• Kameron

• Myriah

• They have spend the same amount each day.

The graph shows the proportional relationship between the number of days, x, Restaurant T is open and how many people they served, y. The equation y = 82x represents the relationship for Restaurant S. Which restaurant served more people?

• Restaurant S

• Restaurant T

• They both served the same amount of people

Which pizzeria makes more money?

• Pizzeria W

• Pizzeria L

• They both make the same amount

The graph shows the proportional relationship between the number of days Restaurant T is open and how many people they served. The equation y=75x represents the relationship for Restaurant S. Which restaurant served more people?

• Restaurant S

• Restaurant T

• They both served the same amount of people