Texas Algebra STAAR

A savings account balance can be modeled by the graph of the linear function shown on the grid. What is the rate of change of the balance with respect to the number of deposits?

• $100 per deposit

• $50 per deposit

• $0.50 per deposit

• $2 per deposit

Which expression is equivalent to 2x² + (4x - 6x²) + 9 - (6x + 3)?

• -4x² - 2x + 12

• -4x² - 2x + 6

• -10x + 6

• 18x +12

The table represents some points on the graph of a linear function. Which function represents the same relationship?

• h(x) = -3x - 10.5

• h(x) = -x - 3.5

• h(x) = 3x - 10.5

• h(x) = x - 3.5

Which expression is equivalent to 2x² + 7x + 4 ?

• (2x - 1)(x + 4)

• (2x + 1)(x - 4)

• (2x + 1)(x + 4)

• None of these

The graph of 0.5x - 2y = 3 is shown on the grid. Which ordered pair is in the solution set of 0.5x - 2y ≥ 3?

• (-2, 0.5)

• (2, 1)

• (2, -1)

• (-2, -0.5)

What value of x makes the equation

-5x - (-7 - 4x) = -2(3x - 4) true?

• x = 3

• x = 5

• x = ¹/₃

• x = ¹/₅

Linear function f(x) = x is graphed on a coordinate plane. The graph of a new line is formed by changing the slope of the original line to ²/₃ and the y-intercept to 4. Which statement about the relationship between these two graphs is true?

• The graph of the new line is steeper than the graph of the original line, and the y-intercept has been translated down.

• The graph of the new line is less steep than the graph of the original line, and the y-intercept has been translated up.

• The graph of the new line is steeper than the graph of the original line, and the y-intercept has been translated up.

• The graph of the new line is less steep than the graph of the original line, and the y-intercept has been translated down.

What is the y-intercept of the line graphed on the grid?

• 5.5

• 7.5

• ^{- 4}/₃

• - ⁸/₆

Which statement about

k(x) = -x² - 2x + 15 is true?

• The zeros are -3 and 5, because k(x) = -(x + 3)(x - 5).

• The zeros are -5 and 3, because k(x) = -(x + 5)(x - 3).

• The zeros are -5 and -3, because k(x) = -(x + 5)(x + 3).

• The zeros are 3 and 5, because k(x) = -(x - 3)(x - 5).

The exponential function modeled above represents the number of square kilometers of land occupied by cane toads x years after this animal was first introduced into Australia.

Based on the data, which measurement is closest to the number of square kilometers of land that will be occupied by cane toads 40 years after this animal was first introduced into Australia?

• 550,000 km²

• 1,250,000 km²

• 600,000 km²

• 800,000 km²