SOLUTION: I need help.Urgent help.Please explain to me how to do this problem listed below. Directions: Write an equation of a line that contains the given point and is PERPENDICULAR to

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: I need help.Urgent help.Please explain to me how to do this problem listed below. Directions: Write an equation of a line that contains the given point and is PERPENDICULAR to       Log On


   

Question 27651: I need help.Urgent help.Please explain to me how to do this problem listed below.
Directions: Write an equation of a line that contains the given point and is PERPENDICULAR to the given line.
(6,5) y = -1/2x+1
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
If 2 straight lines are perpendicular, having gradients m and n, then we know that m*n = -1.

So, the equation has gradient (-1/2), so our line must have gradient 2.

So, our equation is y=2x+c. Now find c by putting in a set of (x.y) values --> 6,5).

final answer is y = 2x - 7.

jon.