Let f be the function whose graph consists of the points {(3, 2), (5, 8), (7, −4)} and g be the function whose graph consists of the points {(−4, 5), (2, 8), (3, 6)}. Find (g ∘ f)(3).

Answer 1

(g_°f)(3) = g(f(3)). Given that f(3)=2, under substitution, (g_°f)(3)=g(2)=8.