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Bab Fungsi
Matematika SMP Kelas VIII

f(x) = px + q

f(-2) = -2p + q = -13
f( 3 ) = 3p + q = 12
.........--------------------- -
.................... -5p = -25
.................... p = 5

3p + q = 12
3 . 5 + q = 12
q = 12 - 15
q = -3

f(x) = 5x - 3

f(5) = 5 . 5 - 3
f(5) = 25 - 3
f(5) = 22

✩✩ D ✩✩