# equations of lines

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• Sep 16th 2011, 09:30 AM
andyboy179
Re: equations of lines
thanks alot, we had 2 classes put together!

so from my original question the first slope =2 so would the second =-1/2?
• Sep 16th 2011, 09:40 AM
Wilmer
Re: equations of lines
Quote:

Originally Posted by andyboy179
thanks alot, we had 2 classes put together!
so from my original question the first slope =2 so would the second =-1/2?

Geezzzzz YES Andy; WHY are you asking? Get more confidence in yourself...
• Sep 16th 2011, 09:43 AM
Prove It
Re: equations of lines
Quote:

Originally Posted by andyboy179
thanks alot, we had 2 classes put together!

so from my original question the first slope =2 so would the second =-1/2?

Yes.

So for the equation of the line you are trying to find, it is of the form y = mx + c, and you have now found m = -1/2, use this and the fact that (x, y) = (0, 0) is a point that lies on the line, to evaluate c.
• Sep 16th 2011, 09:47 AM
andyboy179
Re: equations of lines
(Giggle)thanks, but what would i do next?
• Sep 16th 2011, 09:48 AM
Prove It
Re: equations of lines
Quote:

Originally Posted by andyboy179
(Giggle)thanks, but what would i do next?

You have an x value, a y value and an m value. Put them into y = mx + c and solve for c.
• Sep 16th 2011, 09:50 AM
Wilmer
Re: equations of lines
Quote:

Originally Posted by andyboy179
(Giggle)thanks, but what would i do next?

• Sep 16th 2011, 10:04 AM
andyboy179
Re: equations of lines
• Sep 16th 2011, 11:50 AM
Siron
Re: equations of lines
I recommand you to read post 18 (of Prove it) again, this post tells everything you have to do.
• Sep 16th 2011, 11:53 AM
andyboy179
Re: equations of lines
so it would be 0=-1/2+c
+1/2 to each side so C=1/2?
• Sep 16th 2011, 01:02 PM
Wilmer
Re: equations of lines