is some kind of parabola or something too?
Is the inverse of if it's g lets say
??
if so is the domain all real numbers (for the inverse I mean)?
then the question says find a formula for computing for each y in the domain of g
Yes, to be clear you shouldn't call it a parabola, but just state the fact that it is an even function. It probably doesn't matter unless you are in an Analysis class.