REGRESSION Polynomial Regression (Page 4 of 4)

By adding the Y1 symbol at the end of the command, the TI-83 or TI-84 will automatically enter the equation of the regression model in the function editor as function Y1 (if you want to save the previous model, use a different name). Check to see that this has been done.

Y= key. Calculator screen image.

Now let's graphically compare the model against the data.

GRAPH key. Calculator screen image.
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