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Scatterplot, Correlation Coefficients, & Line of Best Fit
Presentation
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Mathematics
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9th Grade
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Practice Problem
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Medium
+1
Standards-aligned
Brittany Rose
Used 84+ times
FREE Resource
5 Slides • 8 Questions
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Scatterplots, Correlation Coefficients, & Line of Best Fit
Algebra 1
2
Example
A group of scientists were conducting a study on a particular type of crime in Lexington, Kentucky. They conducted the study over 10 years and the results are shown in the table below, where x represents the year and y represents the number of times that crime was committed.
Use Desmos to construct a scatterplot of the given data.
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4
You Try It #1
The profit of a company is based on the price of the product it sells. The table below shows how the profit of a company (y) is related to the cost of one of its products (x).
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Open Ended
A) What is the line of best fit?
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Multiple Choice
B) What is the correlation coefficient, r? (Round to the nearest hundreth.)
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Multiple Choice
C) What does the correlation coefficient tell you about the cost of the product & the profit?
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Multiple Choice
D) Use the line of best fit to determine the profit in thousands if the cost of the product was $15. (Round to the nearest tenth.)
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You Try It #2
The table shows the IQ of 7 senior students (y) along with the number of hours of TV each student views per week (x).
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Open Ended
A) What is the line of best fit?
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Multiple Choice
B) What is the correlation coefficient, r? (Round to the nearest hundreth.)
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Multiple Choice
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Multiple Choice
D) Use the line of best fit to determine the approximate IQ of a student who spends about 2 hours watching TV per week.
Scatterplots, Correlation Coefficients, & Line of Best Fit
Algebra 1
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