M1 3.8: Calculating Correlation Coefficient

What is the first step in Desmos to find your correlation coefficient for a data set?

• Input your data set into a table.
• Select the correlation option from the menu.
• Create a scatter plot of the data points.
• Calculate the mean of the data set.

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CCSS.8.EE.B.5

Fill in the blanks to complete the formula for getting your best-fit line on Desmos.

(Don't worry about formatting subscripts)

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CCSS.HSS.ID.C.8

Which of the values provided by the Desmos regression command tells your correlation coefficient?

• R²

• p-value
• standard deviation
• r

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CCSS.HSS.ID.C.8

The correlation coefficient shown in the example is:

(round to two decimal places)

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CCSS.HSS.ID.B.5

What type of correlation do we see in this example?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

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CCSS.HSS.ID.B.5

Which range of r values would be appropriate for a weak positive correlation?

• 0.1 to 0.4

• 0.7 to 0.9
• -0.1 to 0.1
• 0.4 to 0.6

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CCSS.8.EE.B.5

LESSON CHECK:

Which of these is the correct formula to get a linear regression in Desmos?

• None of these

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Which of the following is an appropriate correlation coefficient for a strong positive correlation?

• 0.6 to 0.7
• 0.75 to 0.79
• 0.8 or higher
• 0.5 or lower

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CCSS.HSS.ID.B.5

Categorize the sets of options to fit the different types of correlations.

Groups:

(a) Strong positive

,

(b) Strong negative

,

(c) Weak positive

,

(d) Weak negative

• 
• 
• 
• 

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CCSS.HSS.ID.C.8

Fill in the blanks with the correlation coefficient value for the data set shown.

(Round to 2 decimal places)

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