The inverse is f^-1(x) = 2/7 + x/7
5x^4 - 37x^3 - 6x^2 + 41x - 6
To make a LINE that is 12 cm long, you'd need (12 / .75) cubes or sixteen cubes.
To make a CUBE you'd need 16^3 cubes or 16*16*16 cubes or 4,096 three quarter centimeter cubes.
Check the picture below.
recall that negative angles go "clockwise".