2018 STAAR Algebra Released Test

At a restaurant jars of tomato sauce are stored in boxes in the pantry. Each box contains 8 jars of tomato sauce. A cook uses 2 jars from 1 of the boxes. Which function shows the relationship between y, the total number of jars of tomato sauce remaining in the pantry, and x, the number of boxes in the pantry?

• y = 8x + 6

• y = 8x

• y = 8x – 2

• y = 6x

Which expression is equivalent to -28x² + 35x?

• 7x(4x + 5)

• -7x(4x – 5)

• 7x(4x – 5)

• -7x(4x + 5)

Which graph best represents a system of equations that has no solution?

• Graph A

• Graph B

• Graph C

• Graph D

Which statement about the graph of y = 8(0.25)^x is true?

• The coordinates of the x-intercept are (0.25, 0).

• The coordinates of the y-intercept are (0, 8).

• The equation of the asymptote is x = 0.

• The graph includes the point (2, 1).

What is the range of y = -x^2 - 2x + 3?

• x ≤ 4

• x ≥ -4

• y ≤ 4

• y ≥ -4

Which expression is equivalent to (144k^2r^(1/2))^2 for all positive values of k and r?

• 12k^7

• 72k^2r^14

• 144k^7

• 12k^2r^14

The graph shows the height in feet of an object above the ground t seconds after it was launched from the ground.

• h(t) = -16t^2 - 64t

• h(t) = -16t^2 + 128t - 256

• h(t) = -16t^2 + 64t

• h(t) = -16t^2 - 128t - 256

What value of n makes the equation 4(0.5n - 3) = n - 0.25(12 - 8n) true?

• 3

• -9

• 0

• -15

In a sequence of numbers, a_3 = 0, a_4 = 6, a_5 = 12, a_6 = 18, and a_7 = 24. Based on this information, which equation can be used to find the nth term in the sequence, a_n?

• a_n = -6n + 18

• a_n = -18n + 6

• a_n = 6n - 18

• a_n = 18n - 6

The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105?

• 3/5

• 2/3

• 7

• 15