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Verified answer
Bab Persamaan GarisMatematika SMP Kelas VIII
y = ax + b, tegak lurus, (p, q)
y = -x/a + (p + aq)/a
y = -3x + 6, tegak lurus, (3, 5)
= x/3 + (3 + (-3) . 5)/(-3)
= (1/3) x + (3 - 15)/(-3)
= (1/3) x + (-12/-3)
= (1/3) x + 4