Jawabanmu

2014-08-31T21:40:19+07:00
Tegak lurus brarti m₁= - 1/m₂
Garis-2--> 4y= -3x+5, berarti y = -(3/4)x+5/4
gradien garis-2--> m= y'= -3/4

gradien garis-1 --> m₁=-1/m₂=4/3
y-y₁=m(x-x₁) ---> masukin koordinat (1,2)
y-2=(4/3)(x-1)
y-2=(4/3)x-(4/3)
y=(2/3)x-(2/3)

y= \frac{2}{3}x- \frac{2}{3}
semoga bermanfaat =)