7R Unit 3 Proportional Relationships Test Review

• 8

A bakery has several cakes for sale. Five of the cakes have chocolate frosting and three of the cakes have vanilla frosting. Which of the following is not a correct way to represents the ratio of these two quantities?

• 10 chocolate to 6 vanilla

• 5 vanilla to 7 chocolate

• 15 chocolate to 9 vanilla

• 15 vanilla to 25 chocolate

The total cost of the doughnuts is proportional to the number of doughnuts bought. Sally can buy 6 doughnuts for $9. Which of the following represents the constant of proportionality?

• $0.67 per doughnut

• $1.50 per doughnut

• $0.54 per doughnut

• $3 per doughnut

The variables a and b are proportional to one another. When a = 2 , the value of b equals 10. Which of the following equations gives the relationships between a and b?

• b = 5a

• b = 1/2a

• b = 1/5a

• b = a + 8

Which point below would represents the Constant of Proportionality (k) on a graph representing a proportional relationship?

• (0. k)

• (k, 1)

• (k,0)

• (1,k)

Jack is a salesperson who earns a $3.00 bonus for every $50.00 he has in sales. Which equation below can be used to find the value of b, the bonus that Jack received for having $840 in sales.

A recipe calls for 1/4 cup of sugar and 1/2 cup of flour. Which of the following is the ratio of sugar to flour in this recipe?

• 2 cups sugar to 1 cup flour

• 1/2 cup sugar to 1 cup flour

• 1/8 cup sugar to 1 cup flour

• 1/2 cup flour to 1 cup sugar

A small craft store owner is looking over their prices for an item that they sell. Using this information, which of the following would represent the total cost of 11 items at this shop?

• $140

• $154

• $165

• $175

Find the unit rate that the water is evaporating at, in terms of inches per hour.

• 8 inches per hour

What two features of this graph tell you that Caitlin's earnings are are proportional to the hours she worked?

• All points lie on a straight line

• There are six points plotted on the graph

• Caitlin's earning are increasing over time

• The line passes through the origin (0,0)