Is the following function exponential?

What is the inverse of the function f(x) = 2x + 1?

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)