Question 467987
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
Might recommend the FREE graph software at:
http://www.padowan.dk.com
f(x) = e^x       GREEN
f(x) = e^x - 4   BLUE
f(x) = -e^x      PURPLE
{{{drawing(300,300,   -6, 6, -6, 6,grid(1),
circle(0, 1,0.3),
circle(0, -3,0.3),
circle(0, -1,0.3),
graph( 300, 300, -6, 6, -6, 6,0,e^x,e^x-4,-e^x,-4))}}}