Posted by Shirley on .
How do you find the distance from the point to the line given the equation and the coordinates?
put the line in slope intercept form
then,you know the slope of the perpendicular line is the negative reciprocal of m (new slope of perpendicular line=-1/m
So for the perpendicular line...
y=-1/m x + b
put in the point 1,1
1=-/m + b you know m, solve for b.
there is a little formula for this question:
for Ax + By + C = 0
the distance from a point (p,q) to that line is
│Ap + Bq + C│/√(a^2+b^2)
so distance = │4-2-6│/√(16+4)
= 4√20 /20