Y=-2+5

Y=1/2x+4

how do i know if the lines are parallel perpendicular or neither?

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- Aug 22nd 2007, 05:52 AMChE´PArallel perpedicular or neither
Y=-2+5

Y=1/2x+4

how do i know if the lines are parallel perpendicular or neither? - Aug 22nd 2007, 06:40 AMtopsquark
- Aug 23rd 2007, 02:45 PMkwah
If the equations have the same gradient, then it is parallel.

ex.

$\displaystyle y = 2x + 1$

$\displaystyle y = 2x - 13$

the + or - just tells you how far up/down the y axis it is

if, on the other hand, they are the same but the negative equivalent, then they are parallel

ex.

$\displaystyle y = 2x + 1$

$\displaystyle y = -2x - 13$

again, the + or - number doesnt matter; for example, $\displaystyle +0.5x$ & $\displaystyle -0.5x$, $\displaystyle +20,000x$ & $\displaystyle -20,000$, and $\displaystyle +zx$ & $\displaystyle -zx$ are all perpendicular to each other

does this make sense? - Aug 23rd 2007, 02:48 PMtopsquark
- Aug 23rd 2007, 03:51 PMkwah