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Gradiennya -a/b × m₂ = -1
- (-4/3) × m₂= -1
m₂= -3/4
Rumus persamaan garis satu titik
y-y₁ = m(x - x₁)
y-5 = -3/4(x + 2)
semuanya dikali 4 (disederhanakan)
4y - 20 = -3x + -6
4y + 3x = -6 + 20
4y + 3x = 14