Writing Linear Equations Review

Write an equation for a line in slope-intercept form with a slope of  $-\frac{1}{2}$  and a y-intercept of  $10$  .

•  $y=-\frac{1}{2}x+10$  

•  $y=10x-\frac{1}{2}$  

•  $-\frac{1}{2}x+10y=5$  

•  $y-\frac{1}{2}=10\left(x-\frac{1}{2}\right)$  

Tags

CCSS.HSA.CED.A.2

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.2

What is the equation for this line?

• $y=2x+4$

• $y=-2x-1$

• $y=-\frac{3}{4}x+2$

• $y=-\frac{1}{2}x+2$

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSG.GPE.B.5

What is the equation for this line?

• $y=\frac{2}{3}x-3$

• $y=\frac{3}{2}x-3$

• $y=4x+3$

• $y=\frac{4}{3}x+0$

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSG.GPE.B.5

Write an equation for the line that passes through the points  $\left(0,\ -2\right)$  and  $\left(4,\ 10\right)$  .

•  $y=\frac{1}{3}x-2$  

•  $y=4x-2$  

•  $y=10x-2$  

•  $y=3x-2$  

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.C.7

Write an equation in point-slope form for the line with a slope of  $\frac{1}{2}$  and passes through the point  $\left(4,\ -7\right)$  .

•  $y+7=\frac{1}{2}\left(x-4\right)$  

•  $y-7=\frac{1}{2}\left(x-4\right)$  

•  $y-4=\frac{1}{2}\left(x-7\right)$  

•  $y-4=\frac{1}{2}\left(x+7\right)$  

Tags

CCSS.HSA.CED.A.2

CCSS.HSG.GPE.B.5

What is the equation for this line in slope-intercept form?

• $y-1=2\left(x-3\right)$

• $y=2x-5$

• $2x-y=5$

• $y=2\left(x-1\right)-3$

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

Which equation is a line that is parallel to  $y=-\frac{3}{4}x+10$  ?

•  $y=\frac{4}{3}x+10$  

•  $y=\frac{3}{4}x-10$  

•  $y=-\frac{3}{4}x-2$  

•  $y=-\frac{4}{3}x-2$  

Tags

CCSS.HSG.CO.A.1

CCSS.HSG.GPE.B.5

Which equation is a line perpendicular to  $y=-\frac{3}{4}x+10$  ?

•  $y=\frac{4}{3}x-6$  

•  $y=-\frac{4}{3}x-10$  

•  $y=-\frac{3}{4}x-6$  

•  $y=\frac{3}{4}x+10$  

Tags

CCSS.HSG.CO.C.9

CCSS.HSG.GPE.B.5

Describe the correlation of these data.

• Positive Correlation

• Negative Correlation

• No Correlation

• Partial Correlation

A student entered data in a calculator and to find an equation for the line of best fit. These are the results:
 $a=5.23$  ,  $b=-87.66$  , and  $r=-0.987$  .
Identify and interpret the correlation coefficient.

•  $a=5.23$  , strong positive correlation

•  $b=-87.66$  , strong negative correlation

•  $r=-0.987$  , strong negative correlation

• There is no correlation