Write an equation for the line perpendicular to y=2x-5 that contains (-9,6).?

[Smiley]

can someone explain how to do this?!

 

[nozar nazari]

m || =2 ,======> m_|_ =-1/2
then, (y-6) / (x+9)=-1/2 , 2y-12=-x-9 , 2y=-x+3 , y=-1/2 x + 3/2

God bless you.