Texas Instruments TI-89 corr is defined for a linear regression only; R2 is defined for all polynomial regressions.

Statistics and Data Plots 550
†† corr is defined for a linear regression only; R2 is defined for all polynomial
regressions.
Note:
• If regeq is 4x + 7, then regCoef is {4 7}. To access the “a” coefficient (the 1st element
in the list), use an index such as regCoef[1].
maximum of x values maxX maxX
minimum of y values minY
maximum of y values maxY
1st quartile q1
median medStat
3rd quartile q3
regression equation regeq
regression coefficients
(a, b, c, d, e)
regCoef
correlation coefficient †† corr
coefficient of determination †† R2
summary points
(MedMed only) †
medx1, medy1,
medx2, medy2,
medx3, medy3
One
Var
Two
Var
Regressions