New User - Interval not Identified

[DarthOdor]

I'm new to learning this PRIME. x^2 - 2x -8 <-0
-2<_ X<_4
The graph should show the inside of the parabola at/below the x-axis shaded. Instead, I only see the inside of the entire parabola as shaded. What I don't get, is that on the Toshiba, I could change f(x)= into f(x)<_ and the graph would be correct. I don't find a method that correctly graphs the interval on the prime. Any suggestion is appreciated.