Jawabannya apa?……

F(x) = 7x + 2

f(3) = 7(3) + 2 = 21 + 2 = 23
f(-3) = 7(-3) + 2 = -21 + 2 = -19
f(1) = 7(1) + 2 = 9

HPB = {(3,23), (-3,-19), (1,9)}