STAAR REVIEW

• $y+2=\frac{7}{5}\left(x+7\right)$

• $y+2=\frac{5}{7}\left(x+7\right)$

• $y-2=\frac{7}{5}\left(x-7\right)$

• $y-2=\frac{5}{7}\left(x-7\right)$

What is the equation in slope-intercept form of the line that crosses the x-axis at 36 and is perpendicular (opposite sign and flip fraction) to the line represented by $y=-\frac{4}{9}x+5$  

•  $y=\frac{4}{9}x+16$  

•  $y=\frac{4}{9}x-16$  

•  $y=\frac{9}{4}x+81$  

•  $y=\frac{9}{4}x-81$  

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

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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

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

The graph of linear function g passes through the point (-1, -8) and has a slope of 2. What is the zero of g?

• -6

• 3

• 2

• -1

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A system of equations is graphed on the grid. Which system of equations does the graph represent?

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Tags

CCSS.8.EE.C.8B

The graph of the quadratic function f is shown on the grid. Which of the following best represented the domain and range of f?

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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?

• $n\left(t\right)=-0.002t^2+0.55t+5.02$

• $n\left(t\right)=0.072t^2-0.15t+2.73$

• $n\left(t\right)=-0.002t^2+5.02$

• $n\left(t\right)=0.072t^2+2.73$

Which expression is equivalent to $\left(a^6\right)\left(a^3\right)^4$   for all values of where the expression is defined?

•  $a^{13}$  

•  $a^{42}$  

•  $a^{16}$  

•  $a^{18}$  

Tags

CCSS.HSA.APR.A.1

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Tags

CCSS.HSA.REI.D.12