On Windows systems, use shift return to create new lines without executing. If it doesn't work, carefully check every line to make sure its entered precisely the same. Computers are not very forgiving. Lets use it now. Thin red curve Concave up Concave down Color area shading Green shading upward Beige shading downward Note that local maxima occur where the curve changes from blue to red, and local minima occur where the graph changes from red to blue.
Inflection points occur where the shading changes from green to beige or vice-versa.