diberikan T(x) = d + cx dengan x € R, serta T(-1) = 1 dan T(1) = 7, maka T(9) sama dengan....

T(x) = d + cx

T(-1) = d - c = 1
T(1) = d + c = 7 —
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<===> -2c = -6
<===> c = 3

d - c = 1
d - 3 = 1
d = 1 + 3
d = 4

Rumus : T(x) = 4 + 3x

T(9) = 4 + 3.9 = 31

—Maaf bila ada kesalahan—

T(9) = 17
Correct me if I wrong:)