Determine if the two functions f and g are inverses of each other algebraically. If not, why not?

The polygon tool to draw a rectangle with a length of 5 units and a height of 3 units. one of the sides of the rectangle falls on line ab , and the rectangle has a vertex of a. each segment on the grid represents 1 unit.

Which of the following is true for the relation f(x)=2x^2+1

Answer for 10 points show work you guys in advanced < 3