GR 08 Spring STAAR INTERIM Questions 2024

The graph shows the linear relationship between the balance of a car loan, y, and the number of monthly payments the borrower has made, x.

Based on the graph, which statement is true?

• The original loan balance was $12,000, and each monthly payment is $250.

• The original loan balance was $12,000, and each monthly payment is $1,000.

• The original loan balance was $13,000, and each monthly payment is $250.

• The original loan balance was $13,000, and each monthly payment is $1,000.

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Mabel gets paid $20 to watch her neighbor's dog for a day and an additional $3 each time she takes the dog for a walk. Which equation best represents y, the amount in dollars that Mabel will get paid for watching the dog for a day and taking the dog for x walks?

• y = 20x - 3

• y = 3x - 20

• y = 20x + 3

• y = 3x + 20

The table shows a linear relationship between the variables x and y.

What are the slope of the linear relationship?

The slope of the linear relationship is _______

The table shows a linear relationship between the variables x and y.

What is the y-intercept of the linear relationship?

The y-intercept of the linear relationship is _______.

The two lines graphed on the coordinate grid each represent an equation.

What is the y-coordinate of the ordered pair that represents a solution to both equations?

• 3

• 2

• 4

• 6

A plumber charges a fixed fee for an appointment and an hourly rate for labor. The table shows the total amounts of money the plumber charges for appointments that take different amounts of time.

Which equation best represents c, the total amount in dollars that the plumber charges for an appointment that takes n hours?

• c = 20n + 145

• c = 80n + 65

• c = 20n + 125

• c = 80n + 145

A barrel contains 75 gallons of water. A drain is opened, and the water flows out of the barrel at a rate of 0.5 gallon per minute. Which equation represents y, the amount of water in the barrel at the end of x minutes of draining?

• y = 75x + 0.5

• y = 75x - 0.5

• y = -0.5x + 75

• y = -0.5x - 75

The table shows the linear relationship between the number of loaves of bread produced, x, and the total cost, y, of producing the loaves. What is the rate of change of the total cost of production with respect to the number of loaves of bread produced?

• $1.25

• $0.80

• $1.60

• $0.70

The graph models the linear relationship between the miles driven and the number of gallons of gasoline remaining in a car’s gas tank. Which of these best describes the rate of change for this situation?

• -15

• -25