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m = y₂ -y₁
x₂ -x₁
m = 3 -1
-5 -4
m = 2/-9
maka, gradien garisnya adalah 2/-9 atau -2/9.
Itu jawabannya.
Mencari persamaan garis
y -y₁ = x -x₁
y₂ -y₁ x₂ -x₁
y -1 = x -4
3 -1 -5 -4
y -1 = x -4
2 -9
-9(y -1) = 2(x -4)
-9y +9 = 2x -8
-9y = 2x -8 -9
-9y = 2x -17
atau
-2x -9y +17 = 0