Correlation Math

Describe the correlation in the graph shown.

• Weak Negative

• Weak Positive

• Strong Negative

• Strong Positive

Estimate the correlation coefficient.

• r=-1

• r=-0.5

• r=0.5

• r=1

What type of Correlation?

• Positive Correlation

• Negative Correlation

• No Correlation

Which table correlates to the following scatter plot?

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• 
• 
• 

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

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

A small theme park is trying to determine the number of guests they should expect on a weekend, based on the temperature outside.  Based on the trend line, about how many guests should be expected if the temperature is around 80°?

• 8,300

• 8

• 7,300

• 9,300

Can you guess the correlation?

• Positive

• Negative

• None

Can you guess the correlation?

• None

• Positive

• Negative

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1