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f(0) = 4 --> m.0 + n = 4 --> n = 4
f(-1) = 1 -- > m(-1) + 4 = 1 --> m = 4-1 = 3
maka f(x) = 3x + 4
untuk mencari f(-3) = 3 x 3 + 4 = 13
f(-1)=1 -
-1 3 jadi 3: -1=-3 maka, m=-3
n=-3x0-4=0-4=4
f(x)=mx + n
f(-3)= -3 x -3 + 4 =9 + 4 = 13