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# C1 Maths Help!! Plz watch

1. Outdated
2. There is a mistake in the question. You can see just by looking at the points that one has a negative gradient and the other a positive gradient.
3. (Original post by bull3tkid-ark)
The line r passes through the points (-3,0) and (3,-2) and the line s passes through (5,-3) and (20,9). Show that the lines r and s are parallel.

Is this a trick question? I plotted them both and they looked nowhere near parallel! I also worked out there gradients and they were not the same :s

help please, STEP BY STEP!
thanks :]
Ignore that
4. Oh right there's a mistake... hmmm check it.
5. (Original post by Dededex)
You could do a variety of things to prove that they are parallel.

Personally, I would find the midpoints of each set of coordinates, so for the first one you have:

You know where to go from there I presume?
I am losing the will to live today.
6. (Original post by bull3tkid-ark)
there's 2 questions in a row that don't make sense xDxD
The other one:
The line l passes through the points (4,4) and (-1,-6) and the line n passes through the points (1,8) and (-1,2). Show that the lines l and n are perpendicular.
There's a mistake in this question too. Where did you get these questions from?
7. (Original post by bull3tkid-ark)
there's 2 questions in a row that don't make sense xDxD
The other one:
The line l passes through the points (4,4) and (-1,-6) and the line n passes through the points (1,8) and (-1,2). Show that the lines l and n are perpendicular.
Wrong too.
8. (Original post by Mr M)
I am losing the will to live today.
What? Don't expect me to pick up on mistakes straight away... Ok ok I made a mistake I know but seriously...
9. (Original post by Dededex)
What? Don't expect me to pick up on mistakes straight away... Ok ok I made a mistake I know but seriously...
I genuinely don't know where you were thinking with your suggestion. How would finding the midpoints of two line segments help someone prove they are parallel?

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