REGRESSION Quadratic Regression (Page 2 of 2)

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 Y2 instead). 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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