Any number to the 0 exponent is equal 1, except 0
x = 0, f(x) = 2(0.5)^0 = 2 x 1 = 2
Only the fist table has x = 0 and f(x) = 2
Plug in the rest, matching f(x) in the table 1
x = 1, f(x) = 2(0.5)^1 = 2 x 0.5 = 1
x = 2, f(x) = 2(0.5)^2 = 2 x 0.25 = 0.5
x = 3, f(x) = 2(0.5)^3 = 2 x 0.125 = 0.25
Answer is A. first table
