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→ x dalam fungsi h(x) diganti angka 5, jadi:
a(5) + b = -8
5a + b = -8 .........(i)
h(-2) = 13
→ x dalam fungsi h(x) diganti angka -2, jadi:
a(-2) + b = 13
-2a + b = 13 .........(ii)
→ eliminasi pers. (i) dan (ii)
5a + b = -8
-2a + b = 13
——————— -
7a = -21
a = -3
→ substitusi
5a + b = -8
5(-3) + b = -8
b = 15 -8
b = 7
h(3)
= -3(3) + 7
= -9 + 7
= -2
h (4) : -5
h (3) : -2
h (2) : 1
h (1) : 4
h (0) : 7
h (-1) : 10
h (-2) : 13
b : 3