What is the slope of a line that is perpendicular to V(3, 2), W(8, 5)?

Question

1415 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-04-02T10:00:44

See a solution process below:

The formula for find the slope of a line is:

#m = (color(red)(y_2) - color(blue)(y_1))/(color(red)(x_2) - color(blue)(x_1))#

Where #(color(blue)(x_1), color(blue)(y_1))# and #(color(red)(x_2), color(red)(y_2))# are two points on the line.

Substituting the values from the points in the problem gives:

#m = (color(red)(5) - color(blue)(2))/(color(red)(8) - color(blue)(3)) = 3/5#

Let's call the slope of a perpendicular line: #color(blue)(m_p)#

The slope of a line perpendicular to a line with slope #color(red)(m)# is the negative inverse, or:

#color(blue)(m_p) = -1/color(red)(m)#

Substituting the slope for the line in the problem gives:

#color(blue)(m_p) = (-1)/color(red)(3/5) = -5/3#