Making Predictions with Scatter Plots

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.

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Statistics

Scatter Plots

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

• y = -5/4x + 21

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Line of Best Fit

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

• A

• B

• C

• D

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Scatter Plots

Line of Best Fit

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Estimate the correlation coefficient

• r= -0.9

• r= 0.9

• r=-0.5

• r=0.5

• r= 0.1

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Scatter Plots

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

Which sentence(s) describes the relationship shown on this scatterplot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation between temperature and visitors

• There is a positive correlation between temperature and visitors

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Scatter Plots

Find the equation of the line of best fit for the given data

• y=163.41x + 4.19

• y=-163.41x + 4.19

• y=-4.19x + 163.41

• y= 4.19x - 163.41

• There is no linear correlation of the data set

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Line of Best Fit

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

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Scatter Plots

A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data.

• y = 3/2x + 12

• y = 12x + 1.5

• y = 2/3x - 8

• y = -8x + 0.67

• y = 2/3x + 12

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Line of Best Fit

In this image, how would you describe the point that does not fit the pattern of the other dots?

• The point is a linear model.

• The point is an outlier.

• The point is the range.

• The point is the median.

• The point is the vertex.

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Scatter Plots