Find the exponential function that contains the points (0,7) and (4,112).
f(x) = L ekx when x = 0 f(x) = 7
7 = L ek(0)
L = 7
f(x) = 7 ekx when x = 4 f(x) = 112
112 = 7 ek(4)
ln (112/7) = k4
k = .69315
f(x) = 7 e.69315 x