7th Grade Unit 3 Test

1. Which situation is best described by the graph shown?

• A. JJ purchases chips for $0.75 per bag.
• B. Mark buys packs of gum for $1.50 each.
• C. Paula pays $0.50 per ticket at the fair.
• D. Franco purchases flowers for $3.00 each.

2. The table shows the relationship between x-values and y-values. Which of the following statements is true?

• A. The constant of proportionality is 5.
• B. The y-intercept is 20.
• C. This is an example of a non-proportional relationship.
• D. The rate of change is 7.5.

Find the constant of proportionality in the graph below.

• 9
• 4
• 3
• 1.5

• 
• 
• 
• 

5. The table below shows the relationship between the number of miles traveled, x, and the gallons of gas used, y. Which of the following equations best represents the relationship?

• 
• 
• 

6. Which of the following does NOT represent the number of months in a year?

• 
• 
• 
• 

7. Which of the following tables best represents a proportional relationship?

• 
• 
• 
• 

8. Which situation best represents the equation y=2.5x?

• A. John has $2.50 more in his savings than his brother Sam.
• B. Meg pours 2.5 ounces of water onto the plant’s soil each day.
• C. A bank account is opened with a balance of $5, and $2.50 is deposited each day.
• D. Two cartons of eggs ring up at the register for $2.50.

9. Which of the following situations represents a proportional relationship?

• A. A cheeseburger is $7.95 plus $1.00 for each additional topping.
• B. A pool fills at a rate of 90 gallons per hour.
• C. A health club charges a $40.00 membership fee plus $25.00 per month.
• D. A bank account begins with $350.00 and gains $30.00 per month.

10. How much money will Calvin make if he works 15 hours?

• A. $232.50
• B. $285.75
• C. $176.50
• D. $157.00