# Direction vector of a line

Nevermore
How would I find the direction vector of a line given in the form ax + by + cz +d =0?

Thankyou.

Homework Helper
I see an equation of a plane, not a line.

Nevermore
Damn, sorry, got carried away with my letters. I meant ax + by +c = 0. Sorry about that...

Homework Helper
Nevermore said:
Damn, sorry, got carried away with my letters. I meant ax + by +c = 0. Sorry about that...
For a line, (1,m) is always a directional vector where m is the slope. Can you find the slope?

Nevermore
Yeah - I thought it would be something simple like that. Thanks for your help.

Homework Helper
You're welcome

SirAllan
Thanks for asking that Q, it helped me too

Homework Helper
I don't think there's a need to thank someone who started a thread two years ago and have not posted since.

SirAllan
LORL... Thanks for pointing that out. ( At least you still logon)