( 9 ) If the curve of the function f intersects the curve of the function f-1 at the point (k , 2 k - 3) , then k =
(a) 2
(b) 3
(d) 5
(c) 4

If you double the input of a function and it results in half the output, and if you triple the input and it results in a third of the output, what can be guessed about the function? check all that apply.