Algebra I STAAR

Which expression is equivalent to (10 + 7r-r²) + (−6r² − 18 + 5r)?

• −7r² + 2r + 8

• 7r² + 12r + 8

• −7r² + 12r - 8

• −7r² + 2r - 8

Which graph best represents the solution set of y > 3x − 4?

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A company collected data for the number of text messages sent and received using a text-message application since October 2011. The table shows the number of text messages sent and received in billions over time. The data can be modeled by a quadratic function. Which function best models the data?

• n(t) = −0.002t² + 0.55t + 5.02

• n(t) = 0.072t² − 0.15t + 2.73

• n(t) = −0.002t² + 5.02

• n(t) = 0.072t² + 2.73

Which graph best represents y = −x² + 6x − 1?

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A company advertises on a website. A worker tracked the number of visits to the website and the number of clicks on the advertisement. The table shows the data for several days. A linear function can be used to model the data. Based on the table, what is the best prediction of the number of clicks on the advertisement if 1,500 people visit the website?

• 77

• 137

• 83

• 105

The graph of a linear function is shown on the grid.

Which equation is best represented by this graph?

• y + 2 = 7/5(x+7)

• y - 2 = 7/5(x-7)

• y + 2 = 5/7(x+7)

• y - 2 = 5/7(x-7)

Which expression is equivalent to (xy^-6)² for all values of x and y where the expression is defined?

• xy^-36

• xy³⁶

• x^2y^-12

• x^2y¹²

The graph of linear function f passes through the point (1, −9) and has a slope of -3.

What is the zero of f?

• 2

• 4

• -6

• -2

What is the value of the y-intercept of the graph of h(x) = 29(5.2)^x?

Record your answer and fill in the bubbles on your answer document.

Which function is best represented by this graph?

• h(x) = x²− 3x - 9

• h(x) = x^2 + 3x − 9

• h(x) = x² − 6x

• h(x) = x² + 6x