I got this function by combining three other functions and limiting their domain and range so that they only went to where they were supposed to be. These functions included (from left to right) a linear function, a circle function, & a parabolic function
The way to find the inverse of a function is to input y wherever there is an x, and put x wherever there is a y then solve for y. Also, the inverse of functions is graphed as a reflection over the axis y=x. Even though my graph didn't completely match up when I folded the plastic sheet through the y=x axis, that's how it's done.. It's only crooked because I didn't do a very good job drawing the parabolas. I think that some functions that can have inverses that are also functions; not parabolas though.