Proportional Graphs

• Proportional

• Non-proportional

• Proportional

• Non-proportional

What makes a graph proportional?

• Linear

• The line goes through the origin

• Curvy line

• Linear and the line goes through the origin

Does the graph show a proportional relationship?

• Yes

• No

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 of potatoes 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.

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.

Tell whether x and y are in a proportional relationship. Explain your reasoning. If so, write an equation that represents the relationship. (Select all that apply.)

• no, the graph of the equation

  does not pass through the

  origin.

• yes, the graph

  is a line through

  the origin.

A snail moving at a constant rate traveled a distance of 2 feet in 1/2 hour. Create a graph to represent y, the number of feet the snail traveled in x hours. Select two points on the coordinate grid that represent the situation.

Tell whether x and y are in a proportional relationship. Explain your reasoning. If so, write an equation that represents the relationship. (Select all that apply.)

• no, the graph of the equation

  does not pass through the

  origin.

• yes, the graph

  is a line through

  the origin.