View Full Version : uh oh I need math help (coordinate geometry)

rogue_eclipse

10-12-03, 12:41

K just a few questions that I can't figure out:

1) write and equation of a line whose x-intercept is the negative of the y-intercept.

2)For the points D(2,3), E(6,-1) and F(2,-1), determine the equation of a line through F and a)parallel to DE b)perpendicular to DE

3)An Equation of the line is y=mx-2. Find the value of 'm' if the line passes through a)(-3,1) b) (5,-2) ('m-'=slope)

4)Two perpendicular lines intersect on the x-axis. An equation of one line is y=(-3x-6) Find and equation for the other line.

Please help me out with these :(

Rogue

TopCat.TopBeing

10-12-03, 12:52

hi mate http://www.tombraiderforums.com/images/smilies/wave.gif well i might be wrong since i dont know the english maths terms that well, but ill try to help You out:

1) this ones easy (if i got the question right):

f(x)=-x (or y=-x)

3) y=mx-2

a)1=-3m-2

3m=-3 |: 3

m=-1

b)-2=5m-2

5m=0 :|5

m=0

id help You with the others, but i dont know some of the terms http://www.tombraiderforums.com/images/smilies/tongue.gif http://www.tombraiderforums.com/images/smilies/smile.gif

rogue_eclipse

10-12-03, 13:05

Thanks TC!

Rogue http://www.tombraiderforums.com/images/smilies/wave.gif

2. a) y = -x + 1

b) y = x - 3

rogue_eclipse

10-12-03, 13:16

Thank you TR-PLayer!

Rogue http://www.tombraiderforums.com/images/smilies/wave.gif

You're welcome! http://www.tombraiderforums.com/images/smilies/wave.gif

4. y = 3x + 6

TopCat.TopBeing

10-12-03, 13:24

hi TR-P http://www.tombraiderforums.com/images/smilies/wave.gif http://www.tombraiderforums.com/images/smilies/smile.gif

np Rogue ;)

Hi TopCat! http://www.tombraiderforums.com/images/smilies/wave.gif

rogue_eclipse

10-12-03, 13:33

Hi Everyone! http://www.tombraiderforums.com/images/smilies/grouphug.gif

BTW TC I accidently put a sad face on my PM to you http://www.tombraiderforums.com/images/smilies/tongue.gif

TR-Player: Thanks again. We'll see if you got those right after my math class today lol

TopCat.TopBeing

10-12-03, 13:35

Originally posted by rogue_eclipse:

BTW TC I accidently put a sad face on my PM to you http://www.tombraiderforums.com/images/smilies/tongue.gif hehe i noticed that ;)

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