Question 251124
I'll give you some hints.
y=(4/50)x-12
says the slope is 4/50=2/25
an equation parallel  has the same slope.
an equation perpendicular has a slope of -25/2
parallel y=2/25x+b 
perpendicular y=-25/2x+b
plug in your x's and y's to find b
then rewrite the equation with that b

y=-25/2x+b
(8,15) 
15=-25/2(8)+b

y=-25/2+b
(6,3)

3=-(25/20*6+b

y=2/25x+b 
(1,1)
1=2/25(1)+b 

then rewrite the equation with that b