Which equation represents the exponential function that goes through the points (0,4) and (3, 1/2). A. y= 1/2(4)^x
B. y=4(2)^x
C. y=(1/2)^x
D. y=4(1/2)^x

PLEASE HELP!

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1