f(X) = 2x + 1 f(2) = ?
f(2) = 5
f(x) = 2x + 1 f(-1) = ?
f(-1) = -1
g(x) = x2 - 3 g(2) = ?
g(2) = 1
g(x) = x2 - 3 g(0) = ?
g(0) = -3
f(x) = x2 + 1 f(1) = ?
f(1) = 2
