How do you find a line that passes through (3,5) perpendicular to a line whose slope is -1/9?
1 Answer
Feb 17, 2017
Explanation:
The standardised equation of a strait line is
Any line perpendicular to this will have the gradient of:
So in this case as
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Thus the equation of the line we are after is
This line passes through the point
so by substitution we have:
subtract 27 from both sides
Thus we have: