Write a program: graph() prgm local a,b for a,xmin,xmax,(abs(xmax)+abs(xmin)+1)/ [put screen width here] for b,ymin,ymax,(abs(ymax)+abs(ymin)+1)/ [put screen height here] if equation(a,b) = 1 pointon a,b endfor endfor endprgm equation(x,y) func if y= [blah blah of x] return 1 else return 0 endif endfunc Try this.