Set up an equation for the line (2,3) which is perpendicular to the line (2, -1) and (-1.-3). Don't understand this at all. Can someone please help me?!
Set up an equation for the line (2,3) which is perpendicular to the line (2, -1) and (-1.-3). Don't understand this at all. Can someone please help me?!
Thx!
Use the equation of a straight line:
where
You have the two points for a line so you can work this out.
For two lines to be perpendicular their gradients , must equal -1 and so
Now is known use the point (2,3) to get an equation of the form
Last edited by e^(i*pi); Dec 12th 2009 at 01:48 PM.
Reason: lates
You have been shown excatly how to do this question and given all the information required for doing it. Your troubles will be caused by poor algebra. So please show all your working so that your mistake(s) can be explained to you.