Fall STAAR Interim Questions

The table shows the cost of buying x tickets to a school play.

If the data are graphed on a coordinate grid, what is the y-intercept of the line that passes through these data points?

• 2.55

• 8.50

• 4.25

• 0

Alfredo is buying a watch for $200. He will make an initial payment of $50 and then pay the remaining balance in payments of $15 per week. Which function can be used to find a, the amount he will still need to pay at the end of n weeks?

• a = −15n + 50

• a = 50n + 15

• a = 15n + 150

• a = −15n + 150

The graph shows how the value of a car changes over time. Which function best represents the relationship shown in the graph?

• y = -3,000x + 9

• y = 27,000x + 9

• y = 27,000x - 3,000

• y = -3,000x + 27,000

The table shows some ordered pairs for a linear function. What are the slope and the y-intercept of the graph of this function?

• Slope = 2, y-intercept = -4.5

• Slope = 2, y-intercept = -5

Two lines representing linear equations are graphed on the coordinate grid. Which statements about the solution to the system of equations are true? Select TWO correct answers.

• The x-coordinate of the solution is 3.

• The x-coordinate of the solution is 1.

• The y-coordinate of the solution is 1.

• The y-coordinate of the solution is 0.

• The y-coordinate of the solution is -1.

The two lines graphed on the coordinate grid represent a system of equations. What is the x-coordinate of the ordered pair that best represents a solution to both equations?

• -2

• 6

• -1

• 3

Which function is best represented by this graph?

• y = -2x - 1.5

• y = 2x - 1.5

• y = -2x + 3

• y = 2x + 3

A pilot takes a taxi from the airport to a hotel. The taxi driver charges a $2.50 initial charge plus $2.65 per mile. Which equation can be used to find y, the total cost of the trip, if x represents the number of miles of the trip?

• y = 2.50x + 2.65

• y = 2.65 (x + 2.50)

• y = 2.65x - 2.50

• y = 2.65x + 2.50

Which rule best represents the dilation that was applied to triangle KLM to create triangle K'L'M'?

• (x, y) → (1.5 + x, 1.5 + y)

• (x, y) → (2.5 + x, 2.5 + y)

• (x, y) → (1.5x, 1.5y)

• (x, y) → (2.5x, 2.5y)

A figure is reflected over the y-axis. Write a rule that describes this transformation. Move the correct answer to each box. Not all answers will be used. (Answer must be an ordered pair)