Question

Kasih atau dong no 4 aja

Answer 1

W(x)=ax+b
W(0)=5
W(-7)=-9
Jika W(x)=-107
tent x
W(0)= a×0+b=5 maka b=5
jW(-7)=-7a+5=-9
a=2
W(x)=2x+5=107
2x=102
x=56

Pembuktian jika x=56
W(56)=2×56+5=107
102+5=107

Answer 2

W(0) = a(0) + b = 5
= b = 5
W(-7) = a(-7) + 5 = -9
= -7a + 5 = -9
= -7a = -9 - 5
= -7a = -14
= a = -14/-7 = 2

W(x) = ax + b = -107
= 2x + 5 = -107
= 2x = -107 - 5 = -112
= x = -112/2 = -56