Fungsi f dinyatakan dengan rumus f(x) =px+q jika f(o) =-2 dan f(2)=4 tentukan f(5)

f(x) = px + q

f(0) = p • 0 + q
-2 = 0 + q
q = -2

f(2) = p • (2) + (-2)
4 = 2p - 2
6 = 2p
p = 3

diperoleh
f(x) = 3x - 2

f(5) = 3 • 5 - 2
f(5) = 15 - 2
f(5) = 13 ✓