Question

Persamaan garis melalui titik (-2,1) dan tegak lurus garis yang persamaannya 2y= -x+1 adalah?

Answer 1

2y = -x +1
y = -1/2x +1/2
maka, m₁ = -1/2
m₁ . m₂ = -1
-1/2 . m₂ = -1
m₂= -1 per -1/2
m₂ = 2
y -y₁ = m(x -x₁)
y -1 = 2(x -(-2))
y -1 = 2x +4
y = 2x +4 +1
y = 2x +5