The cubic regression option finds the equation of a cubic equation of the form y = ax

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Enter the columns to be used for the x and y entries, c1 and c2 in this case. The regression equation can be automatically stored in the equation editor by selecting the Stor RegEQ.

Therefore, the best-fit cubic equation for this data is approximately y = 0.03x

The TI-92 does not calculate the correlation coefficient r. It does calculate the coefficient of determination.