Making Predictions from Scatter Plots with Trend Lines

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

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

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

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

• 30 hours

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Scatter Plots

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

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

What type of correlation does this graph have?

• positive linear

• negative linear

• no

• exponential growth

• quadratic

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Scatter Plots

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