I see people that have some trouble with geometry, here are some examples for slopes lines and etc....

Question

solomonzelman · Answer

Lets say you need to find the equation of the line that is perpendicular to y=2x+2 and passes through (6,3).

what is the equation of the line perpendicular to it?

Lets do the steps together. Focus closely.

solomonzelman · Answer

STEP 1:
Graph the y=2x+2.  Plug in -1,  1 for x
you get
(-1,0)
(1,4)

graph these points and connect them with the line.|dw:1382732151038:dw|

solomonzelman · Answer

STEP 2:
find the slope of the line perpendicular to it.
(You know that the standard form is y=mx+b where m is the slope. Compare the y=2x+2 you can see that the slope of that equation is 2.)

To find the slope of the line perpendicular you would take a multiplicative inverse of it.
and multiply it then times -1.
(so if the slope of a line is a, the slope of a perpendicular line to it is  -1/a)

So in this case it is going to be -1/2.

solomonzelman · Answer

STEP 3:
find the y intercept of the line that is perpendicular to it. We know that a perpendicular line is passing through (6,3) so lets graph the perpendicular line.

solomonzelman · Answer

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