Goal: Use a graphing calculator to find the equation of the line of best fit. Eligible Content: A1.1.2.1.1 / A1.1.2.1.3 / A1.2.2.1.3 / A1.2.2.2.1 / A1.2.3.2.1.

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Presentation transcript:

Goal: Use a graphing calculator to find the equation of the line of best fit. Eligible Content: A / A / A / A / A / A / A

* Correlation Coefficient – tells you if the correlation is positive or negative and how close your equation is to modeling the data. * The closer the correlation coefficient is to 1 or -1, the more closely the equation models the data.

The calculator can get a much more exact answer, and it is faster!!! Follow the steps…

The table shows Megan’s hourly earnings for the years 2001–2007. Use a graphing calculator to write an equation for the best-fit line for the data. Let x = 0 represent Name the correlation coefficient. The equation for the best-fit line is y = 1.21x The correlation coefficient is 0.98

y = 0.95x ; The table shows the average body temperature in degrees Celsius of nine insects at a given temperature. Use a graphing calculator to write the equation for the best-fit line for that data. Name the correlation coefficient.

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An air taxi keeps track of how many passengers it carries to various islands. The table shows the number of passengers who have traveled to Kelley’s Island in previous years. Use a graphing calculator to find the equation of the line of best fit. Let x = 0 represent y = 68.71x

Page 259 #1-3 Directions: * Find the equation of best fit using your calculator. * Find the correlation coefficient

Pages #4-6 – write equation and correlation coefficient #7-8 – do all parts of question!