Daniel B. answered 01/27/21
A retired computer professional to teach math, physics
You are given f(x) for x = -12, 0, and 8
f(-12) = 6
f(0) = 8
f(8) = -2
Therefore you are also given f(x-2) for x = -10, 2, 10.
g(-10) = (1/2)f(-10-2) + 1 = (1/2)×6 + 1 = 4
g(2) = (1/2)f( 2-2) + 1 = (1/2)×8 + 1 = 5
g(10) = (1/2)f( 10-2) +1 = (1/2)×(-2) + 1 = 0