Question

Persamaan garis yg melalui (-1,2) dan tegak lurus terhadap garis 4y=-3x+5 adalah

Answer 1

Cari gradien dulu = 4y= -3x + 5 = -3/4
x= -1 y= 2
y-y1 = m ( x- x1 )
y-2 = 2 ( x -(-1)
y    = 2x + 1 + 2
y    = 2x + 3

Answer 2

Gradien
m1.m2 = -1/-3
= 1/3

y-y1=m(x-x1)
y-2=1/3(x-(-1))
y-2=1/3x+1/3
y. = 1/3+1/3+2
y. = 1/3+2/3