(2)y-2=(√3/3)(x+2)

(3)y=3

(4)y+2=(- 1/2)(x+4)

2( 1)y=x+ 1

Slope k= 1, inclination θ=45? (or π/4)

(2)y=√3x+√3-2

Slope k=√3, inclination θ=60? (or π/3)

3( 1)y=(√3/2)x-2

(2)y=-2x+4

3( 1) consists of k 1= 1/2, k2= 1/2,

k 1=k2,∴L 1∥L2

(2)k 1×K2 =(5/3)×(-3/5)=- 1。

∴L 1⊥L2。