Proportional Non-Proportional Relationships Graphs

• y = 1/5x

• y = 5x

• y = 1/2x

Write the equation of the proportional relationship using the format y = kx.

What is the constant of proportionality? Use the format k = 2.

Is the graph proportional?

• Yes

• No

The cost of five pounds of grapefruit is $6.00. The cost per pound of grapefruit remains the same regardless of the quantity purchased. Graph the relationship between y, the total cost of grapefruit purchased, and x, the weight in pounds of the grapefruit purchased.Plot two points on the coordinate grid.

Graph the equation

y=3x

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.

Graph a proportional relationship with a slope of two.