Scatterplots Association and Line of Best Fit

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

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

• A

• B

• C

• D

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

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

• A

• B

• C

• D

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

• Yes

• No

What kind of association is there between the hours of practice and the number of mistakes Koby makes?

• Negative linear association

• Positive linear association

• No association

• Non-linear association

Which best describes the association shown in the scatter plot?

• Negative and linear

• Negative and non-linear

• Positive and linear

• Positive and non-linear

Is the line a good fit for the data in the scatterplot?

• There are an equal number of data points above and below the line, so the line is a good fit.

• There are an equal number of data points above and below the line, but the line does not follow the trend, so it is not a good fit.

• There is no relationship between x and y, so the line is not a good fit.

• There is a non-linear association between the x and y values, so the line is not a good fit.

JoBeth draws a scatter plot that shows as the outside temperature increases, sales at her lemonade stand increase. Which best describes the scatter plot?

• The points show that as x-values increase, y-values increase.

• The points show that as x-values increase, y-values decrease.

• The points show that as x-values decrease, y-values stay the same.

• The points show that as x-values decrease, y-values increase.