Question

A line contains the points (0, -1) and (-1, 2). Another line graphed in the same coordinate plane contains the points (2,0) and (-2,3).
Based on the slope of these lines, are they parallel, perpendicular or neither?

Answer 1

im gonna do my best to draw this

Answer 2

ok well by graphing they appear to be neither

Answer 3

wowo tht was a real good graph!

Answer 4

but there is a way to do this with slope, which i realized is your wuestion

Answer 5

If they are parallel then the slopes will be the same.. If they are perpendicular then the slops will be negative reciprocals of each other.. The slopes are -3 and -3/4 so the answer is neither

Answer 6

^ yeah

Answer 7

are skew lines perpendicular? ifeel like i kno wat skew lines are but im not sure

Answer 8

btw the formula for slope is
\[\left[\begin{matrix}y2 & -y1 \\ x2 &-x1\end{matrix}\right]\]

Answer 9

I'm not sure about skew lines. Ive only had to deal with them once and that was years ago lol

Answer 10

lozl ok well thank u for ur help anyway

Answer 11

no problem

Answer 12

i thnk from what i know, skew lines are line that are on different planes like on a 3d object. the lines dont actually meet so they are not perpendicular

Answer 13

perpendicular lines must meet at 90 deg but since skew lines dont meet they cant be perpendicular

Answer 14

skew lines
pl.n.
Straight lines that are not in the same plane and do not intersect.

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