Slopefields on the TI-82/83

Given a differential equation, say y' = 3x-y, here is how to make the TI-82/83 draw a slopefield for that differential equation.
  1. We must translate the differential equation: In place of the function (y in this case), write Y (upper case), in place of y' write Y1, and in place of the variable (x in this case), write X. So we get Y1=3X-Y.
  2. Now press [Y=] and enter our differential equation from the last step on the first line:
  3. Press [WINDOW] to select a suitable window or range.
  4. Press [PRGM] and select the SLPFE program.  Press [ENTER]once to paste prgmSLPFIELD on your text screen; press [ENTER] again to run the program.

Last Modified December 7, 1998.
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