I don't know how to find the "product of a slope" Somebody please help :(

Question

irishboy123 · Answer

it's most likely where you last left it :p

unless you have a specific example to share.

zpupster · Answer

product of a slope??????
if two lines are perpendicular then the product of their slope is -1.

kawii2004 · Answer

-1

whpalmer4 · Answer

If you have a pair of lines, you can find their slopes by rearranging each line into "slope-intercept" form, which is $$y = mx+b$$where $m$ is the slope and $b$ is the $y$-intercept.  

Having found the slope for the first line (call it $m_1$) and the second line (call it $m_2$) you find the product of the slopes by simply multiplying them together... $m_1 * m_2$

The most frequent reason for wanting to know this is to determine if the lines are perpendicular.  A pair of perpendicular lines will have a product of their slopes which equals $-1$, except in the case where one line is vertical $y = k_1$ and the other is horizontal $x = k_2$ ($k_1, k_2$ are constants)