Algebra I STAAR

Which function is equivalent to g( x ) = x² + 15x − 54?

• g(x) = (x + 9)(x − 6)

• g(x) = (x + 18)(x − 3)

• g(x) = (x − 9)(x + 6)

• g(x) = (x − 18)(x + 3)

What is the equation in slope-intercept form of the line that passes through the points ( -4 , 2) and (12, 6)?

• y = 0.25x + 3

• y = 0.25x − 4.5

• y = 4x + 18

• y = 4x − 42

Which graph best represents -5y = -6x + 15?

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A baker determined the annual profit in dollars from selling pies using p(n) = 52n − 0.05n², where n is the number of pies sold. What is the annual profit if the baker sells 400 pies?

• $20,780

• $12,800

• $28,800

• $20,760

An exponential function is graphed on the grid.

• g(x) = 6(1/3)^x

• g(x) = 6(3)^x

• g(x) = 6 − (1/3)^x

• g(x) = 6 − (3)^x

What is the equation in slope-intercept form of the line that crosses the x-axis at 36 and is perpendicular to the line represented by y = −4/9x + 5?

• y =4/9x + 16

• y =4/9x - 16

• y =9/4x + 81

• y =9/4x - 81

A student worked out at a gym continuously for 50 minutes. The graph shows the remaining percentage of the workout as a linear function of x, the time in minutes.

Which answer choice best describes the domain and range of the function for this situation?

• Domain: All real numbers greater than or equal to 0 and less than or equal to 100 Range: All real numbers greater than or equal to 0 and less than or equal to 50

• Domain: {-2} Range: {100}

• Domain: All real numbers greater than or equal to 0 and less than or equal to 50 Range: All real numbers greater than or equal to 0 and less than or equal to 100

• Domain: {100} Range {-2}

The graph of quadratic parent function f was transformed to create the graph of g(x) = f (x + 2) − 5. Which graph best represents g?

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What is the positive solution to this equation?

4x2 + 12x = 135

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