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This is the regression variable, not to be confused with A, a general use variable.

On the TI-84, when a regression is performed, this is one of the variables that the regression results is stored in. The specific value depends on the regression performed. This is especially helpful when running a regression in a program so the results can be used.

ExampleEdit

:LinReg(ax+b) L1,L2
:a→A
:LinReg(ax+b) L2,L1
:a→B
:Disp A,"IS ONE OVER",B

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