The probability of not spinning an even number should be two out of three or 2/3. because there is only 1 even number (2).

Other method.
Enter the value of x for each equation and check the equality of the pages of the equation

The answer would be 2. This is because inverse means opposite, and since f(x)=-2, then that means the inverse would be 2.
Yes ding ding ding ding ding ding