Best-Fit Lines Review

Which of the following could be the equation of the LINE OF BEST FIT for the data shown here?

• y = 1.3X – 16

• y = -1.3x + 16

• y = -1.3x – 16

• y = 1.3x + 16

Does this data show a “linear” or “nonlinear” association?

• linear

• nonlinear

Tags

CCSS.8.F.A.3

If two quantities A and B exhibit a negative correlation, then as quantity A increases, quantity B would . . .?

• stay the same

• increase

• decrease

Tags

CCSS.HSS.ID.B.5

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

Which line appears to fit the data better?

• line A

• line B

If two quantities A and B exhibit a positive correlation, then as quantity A decreases, quantity B would . . .?

• increase

• decrease

• stay the same

Tags

CCSS.HSF-LE.A.1B

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Tags

CCSS.HSF.BF.A.2

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points
• To make it look like you know what you are doing

Tags

CCSS.8.EE.B.5

What does the value, r= -0.89, tell us about the linear relationship of two quantitative variables?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

Tags

CCSS.HSS.ID.B.5

Determine the correlation coefficient of the given data:

• .9820

• -.9643

• 1.409

• .6864

Tags

CCSS.HSS.ID.C.8