STAAR Review A.2DEF A.4A

Which of the following lines is perpendicular to the x-axis and contains the point  $\left(-11.4,\ 12.8\right)$  ?

•  $y=-11.4$  

•  $y=12.8$  

•  $x=-11.4$  

•  $x=12.8$  

Which of the following lines is parallel to the graph of  $y=-6x+3$  and passes through the point  $\left(-1,\ 4\right)$  ?

•  $y=\frac{1}{6}x+\frac{25}{6}$  

•  $y=\frac{1}{6}x+4$  

•  $y=-6x-2$  

•  $y=-6x+4$  

Which of the following represents the equation of the line passing through  $\left(-4,\ 5\right)$  perpendicular to the line  $y=-\frac{1}{2}x+\frac{5}{2}$  ?

•  $y=2x+13$  

•  $y=2x+5$  

•  $y=-\frac{1}{2}x+3$  

•  $y=-\frac{1}{2}x+5$  

What is the slope of the line perpendicular to the line  $5x+8y=3$  ?

•  $-\frac{8}{5}$  

•  $\frac{5}{8}$  

•  $\frac{8}{5}$  

•  $-\frac{5}{8}$  

Which of the following values is the slope of any line parallel to  $5x+7y=6$  ?

•  $\frac{5}{7}$  

•  $\frac{7}{5}$  

•  $-\frac{7}{5}$  

•  $-\frac{5}{7}$  

Suppose y varies directly as x. If x = 27 when y = 6, find x when y = 2.

• 0.44

• 81

• 23

• 9

On a treasure map, the actual distance is directly related to the scaled distance.  If 15 miles is represented by 3 centimeters, then how many centimeters on the treasure map are equivalent to 135 miles?

• 27 cm
• 675 cm
• 529 cm
• 32 cm

The data can be modeled by a linear function. Find the equation of the line of best fit.

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation