100 DEF f(x)=x^2
110 DEF g(x)=x^3
120 SET WINDOW -4,4,-4,4
130 DRAW GRID
140 FOR x=-4 TO 4 STEP 0.1
150    PLOT LINES: x,f(x);
160 NEXT x
170 PLOT LINES
180 FOR x=-4 TO 4 STEP 0.1
190    PLOT LINES: x,g(x);
200 NEXT x
210 END


