diketahui suatu fungsi f(×)=a×+b . jika f(-1)=-5 dan f(4)=5

f(x) = ax+b -> -5=-a+b
f(x) = ax+b -> 5=4a+b
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-10=-5a
a = 2

-a+b = -5
-2+b = -5
b = -5+2
b = -3