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f(-4) = p(-4) +q = 1
= -4p +q = 1
f(0) = p(0) +q = 7
= q = 7
-4p +q = 1
-4p +7 = 1
-4p = 1 -7
-4p = -6
p = -6/4
p = -1,5
f(x) = -1,5x +7
f(3) = -1,5(3) +7
= -4,5 +7
= 2,5
Itu jawabannya.