diket f(x) = ax + b , f(-1) = -5 , dan f(4) = 5 nilai f(-6) adalah....

f (-1)=a×-1+b=-5,
=-a+b=-5
f (4)=a×4+b=5
=4a+b=5
(-a+b=-5)-(4a+b)=5= -5a=-10

[tex]a = \frac{ - 10}{ - 5} = 2[/tex]
-a+b=-5
-2+b=-5
b=-5+2
b=-3

f (-6)=2×-6+-3
=-12+-3
=-15