y+2=(- 1/2)(x-8)

x+2y-4=0

2)

y=2

y-2=0

3)

x=- 1/2

2x+ 1=0

4)

(x/(2/3))+(y/(-3))= 1

9x-2y-6=0

5)

(-4-(-2))/(y-(-2))=(5-3)/(x-3)

x+y- 1=0

6)

y=x+7

x-y+7=0