How would you describe the difference between the graphs of f(x)2x2 and g(x)-2x2?

Answer 1

If the two at the end of these are exponents, like x^2, then these graphs would be reflections across the x-axis. Their graphs would be two parabolas. f(x) pointing up, and g(x) pointing down.

Answer 2

I suggest you graph the two functions, and look at the graphs to see what they look like.