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Calculating Predictions with Regression Lines

Learn how to use regression lines to make predictions in various scenarios, such as calculating total calories from fat content or estimating the gross amount for a movie.

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Calculating Predictions with Regression Lines

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  1. Example 1:

  2. Slope: • Y-intercept: • Equation of Line:

  3. Making Predictions Once your line of “Best fit” is drawn on the calculator, it can be used to predict other values. On the TI-83/84: • 2nd Calc • 1:Value • x= place in value ***If a sandwich had 32 grams of fat, what would be the predicted total calories?***

  4. Ex. 2: Salary with a Bachelors and Age

  5. Slope: • Y-intercept: • Equation of Line: • Salary of 60 year old with a bachelor degree:

  6. Movie Cost V.Gross (millions)

  7. Slope: • Y-intercept: • Equation of Line: • What would be the gross amount for a movie that cost $150 million?

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