SOLUTION: Find the slope of any line perpendicular to the line through points (0, 5) and (-3, -4).

Algebra ->  Graphs -> SOLUTION: Find the slope of any line perpendicular to the line through points (0, 5) and (-3, -4).      Log On


   

Question 78572: Find the slope of any line perpendicular to the line through points (0, 5) and
(-3, -4).
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Find the slope of any line perpendicular to the line through points (0, 5) and
(-3, -4).
:
Find the slope using the slope equation: m = %28%28y2-y1%29%29%2F%28%28x2-x1%29%29
:
Let x1 = 0, y1 = 5; x2 = -3, y2 = -4
:
m = %28%28-4-5%29%29%2F%28%28-3-0%29%29 = %28%28-9%29%29%2F%28%28-3%29%29 = +3
:
The relationship of the slopes of perpendicular lines: m1 * m2 = -1
Let m1 = +3, find m2
:
3(m2) = -1
m2 = -1%2F3 is the slope of a line perpendicular to the line of the given points
:
It's good idea to memorize these two simple formulas, you will be using them alot