HP 48gII @E IT, @ERASE @DRAW, When done, press, •When done, press @E IT, •When done, press @E IT, @E IT @EDIT L @)LA EL @ME U, •Press @CA CL to return to PLOT WINDOW

•When done, press @E IT.•Press @CA CL to return to the PLOT WINDOW environment.• Change the Step data to read: Step Indep: 20 Depnd: 16•Press @ERASE @DRAW to see the surface plot. Sample views:

•When done, press @E IT.

•Press @CA CL to return to PLOT WINDOW.

•Press $, or L@@@OK@@@, to return to normal calculator display. Try also a Fast 3D plot for the surface z = f(x,y) = sin (x2+y2)

•Press „ô, simultaneously if in RPN mode, to access the PLOT SETUP window.•Press ˜and type ‘SIN(X^2+Y^2)’ @@@OK@@@.

• Press @ERASE @DRAW to draw the slope field plot. Press @E IT @EDIT L @)LA EL @ME U to see the plot unencumbered by the menu and with identifying labels.

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