Scatterplot Table Slope

Give the coordinates of the influential point and provide an explanation why you chose it.

• (8,1) If we remove this point, the slope of the line will dramatically decrease.

• (8,1) If we remove this point, the slope of the line will dramatically increase.

• (1,0) If we remove this point, the slope of the line will dramatically decrease.

• (1,0) If we remove this point, the slope will dramatically increase.

Which of the scatterplots can best be modelled by a regression line? (Check all that apply.)

• A

• B

• C

• D

Calculate the linear regression for the table of data.

• y = x - 1

• y = 2x + 5

• y = -x - 1

• y = -2x + 5

When the influential point (point A) is removed, what will happen to the slope of the regression line?

• The slope will increase.

• The slope will decrease.

• The slope won't change.

• The slope disappears.

• 164.5

• 74.5

• 15.5

• 15

Describe the following scatterplot. Remember to include the shape of the cloud, direction, strength, whether it varies in strength, if there are any clusters and where they are, and if there are any outliers and where they are located. Do NOT hit Enter until you are completely done with the description.

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OFF

The scatterplot shows the relationship between people's heights and weights.

1) Estimate the r-value. 2) Explain why you picked that value. 3)Interpret what that means in terms of height and weight.

Do NOT hit Enter until you are completely done with the question.

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OFF

• The slope of the graph of the equation is 1 more than the slope of the graph of the table.

• The slope of the graph of the equation is 2 more than the slope of the graph of the table.

• The slope of the graph of the table is 1 more than the slope of the graph of the equation.

• The slope of the graph of the table is 2 more than the slope of the graph of the equation.

Shawna will create a scatterplot comparing the length of a string, in inches, to the frequency it creates, in vibrations per second. She will use this table to create the scatterplot. What type of association will the scatterplot show?

• irrational

• zero

• negative

• positive