dik f(x)=ax + b. Jika f(2)=8 dan f(-1)=2 maka nolai a dan b adalah

- Fungsi -

f(x) = ax + b
f(2) = 2a+b
8 = 2a+b
b = 8-2a

f(-1) = -1a + b
2 = -a +(8-2a)
2 = -3a+8
-3a = -6
a = 2

b = 8 -2a
b = 8 -2(2)
b = 8-4 = 4

a = 2 dan b = 4

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-vin