Test 3 Review

Given the equation 3x=15, select ALL the statements that are true.

• The slope of the line is 0.

• The slope of the line is undefined.

• The line is perpendicular to the x-axis.

• The line is parallel to the y-axis.

Given the function  $f\left(x\right)\ =x\ -3.5$  , find  $f\left(\frac{1}{4}\right)$  

•  $\frac{13}{4}$  

•  $-\frac{13}{4}$  

•  $-\frac{1}{4}$  

•  $-\frac{7}{2}$  

If $f\left(x\right)=-\frac{1}{2}x+3$  ,  evaluate  $f\left(-7\right)$  

•  $\frac{13}{2}$  

•  $-\frac{1}{2}$  

•  $0$  

•  $7$  

Find the slope of the line.

• Undefined
• 0
• 1
• -1

Tags

CCSS.8.EE.B.5

Find the slope of the line.

• $-\frac{5}{4}$

• $\frac{5}{4}$

• $-\frac{4}{5}$

• $\frac{4}{5}$

Change the equation to slope-intercept form.

 $7x-3y=21$  

•  $y=\frac{7}{3}x-7$  

•  $y=-\frac{7}{3}x-7$  

•  $y=7x-3$  

•  $y=\frac{7}{3}-7$  

What is the difference between these lines?

 $f\left(x\right)=2x\ +3$   and  $g\left(x\right)=\frac{1}{4}x\ +3$  

• f(x) has negative slope and g(x) has positive slope.

• f(x) is steeper than g(x)

• They have different y-intercepts.

• There is no difference. They are exactly same.

Solve for b.
 $\frac{1}{5}+2b=\frac{8}{15}$  

•  $no\ solution$  

•  $\frac{1}{6}$  

•  $-\frac{1}{6}$  

•  $\frac{11}{30}$  

• .625

• 5.8

• 5/8

• .375

For which of the following values of x is the equation true?

 $2\left(2x+3\right)\ =\ -6\left(x-3\right)$  

• 1.2

• 6

• -6

• 7.5