Scatter Plots and Trend Line Equations

Which of the following would be the most accurate equation for the scatter plot?

• y = -2x - 7

• y = -x + 7

• y = 4x + 7

• y = 25x + 7

Tags

CCSS.8.EE.B.5

Which of the following could be a possible line of best fit for the data?

• y = -1.5x + 20

• y = -0.5x + 19

• y = x + 20

• y = .7x + 15 

Tags

CCSS.8.EE.B.5

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

• y = -25x + 170

• y = 25x + 170

• y = -(5/8) x + 170

• y = (5/8) x + 170

Tags

CCSS.8.EE.B.5

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x

• y = 30x

• y = 30x + 300

• y = (3/2)x + 300

Tags

CCSS.8.EE.B.5

Write the equation of the trend line in slope-intercept form.

Which scatter plot could have a trend line whose equation is y = 3x + 10?

• A

• B

• C

• D

Tags

CCSS.HSF.LE.B.5

Which scatter plot could have a trend line whose equation is y hat= 3x + 10?

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, after how many days should Sammy predict to have 10 comic books left?

• 8

• 0

• 9

• 2

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line given and write an equation.

• y = 0x +10

• y= 0.1x+10

• y= 10x +0

• y= 0.1x +0

Which equation best represents the data?

•  y = x + 2

•  y = -x + 2

•  y = x - 2

•  y = -x - 2