Find Line of Best Fit

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

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

• y = -5/2x + 20

• y = -x + 19

• y = x + 20

• y = 2/3x + 15

Suppose a LINE OF BEST FIT passes through the points (6, 34) and (8, 50). The EQUATION of this line is . . .? (hint: find the slope and the equation in point-slope form. THEN put it into slope-intercept form)

• y = 8x – 5

• y = 2x

• y = 2x + 7

• y = 8x – 14

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

Tags

CCSS.8.EE.B.5

In the scatter plot, does the image shows a "Line of Best Fit"?

• Yes

• No

Tags

CCSS.8.EE.B.5

Select the statement that best describes the line.

• The line is the line of best fit.

• The line is a line of best fit because it is increasing and so is the data.

• The line is NOT a line of best fit because it does not go through the middle of the data set.

• The line is NOT a line of best fit because it does not go through the origin.

Tags

CCSS.8.EE.B.5

What is the best prediction for the number of candies in the jar when 30 students visit her?

• 90

• 180

• 135

• 150

Suppose data related to the AVERAGE Temperature outside (T) and the number of winter Coats (C) sold at a store is collected and graphed. The LINE OF BEST FIT has the equation C = -3T + 150. Use this equation to predict the number of coats sold when the average temperature outside is 20°.

• 40

• 75

• 90

• 115

Suppose a LINE OF BEST FIT passes through the points (4, 8) and (6, 2). The SLOPE of this line is . . .?

• -3

• -6

• 4

• 2

Tags

CCSS.8.EE.B.5

The Y-INTERCEPT of this line is . . .? (hint: find the equation in point-slope form first and then put it into slope-intercept form)

• 11

• 4

• 9

• 20

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3