Width = 18 in, length = 1.92 ft Area = in?

34.56

Just multiply them, and you will get the answer.

f(x) = 3 (2^x) (third option on the list)

Step-by-step explanation:

The correct function is f(x) = 3 (2^x)

notice that such verifies all the three points marked in the graph:

when x = -1 then y = 3 (1/2) = 1.5  --> ( -1, 1.5)

when x = 0 then y = 3 * 1 = 3  -->  (0, 3)

when x = 1, then y = 3 * 2 = 6  -->  (1, 6)