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# Solving cubic graphs watch

1. Hi, I'm currently doing the 2011 paper 1 for revision and I have came across a question, which I'm not sure about. I would really appreciate your help.

This is the paper
http://pastpapers.download.wjec.co.u...09.pdfIt&#39;s 14c which I'm stuck with, I can't understand why the 'appropriate line' should be at y=10, but after that would be okay with solving it. Does anyone know why the line has to be drawn at y=10?Really appreciate it, thank you.
2. (Original post by emily380)
Hi, I'm currently doing the 2011 paper 1 for revision and I have came across a question, which I'm not sure about. I would really appreciate your help.

This is the paper
http://pastpapers.download.wjec.co.u...09.pdfIt&#39;s 14c which I'm stuck with, I can't understand why the 'appropriate line' should be at y=10, but after that would be okay with solving it. Does anyone know why the line has to be drawn at y=10?Really appreciate it, thank you.
I'm getting an Error 404, check the link or post the question
3. (Original post by Andy98)
I'm getting an Error 404, check the link or post the question

4. Yes, I'll just find 14c then
5. (Original post by Andy98)
Yes, I'll just find 14c then
Thank you so much
I'm not sure if it's on my syllabus anymore but I guess I'd better see what I'm getting wrong just in case
6. (Original post by emily380)
Hi, I'm currently doing the 2011 paper 1 for revision and I have came across a question, which I'm not sure about. I would really appreciate your help.

This is the paper
http://pastpapers.download.wjec.co.u...09.pdfIt&#39;s 14c which I'm stuck with, I can't understand why the 'appropriate line' should be at y=10, but after that would be okay with solving it. Does anyone know why the line has to be drawn at y=10?Really appreciate it, thank you.
Ahhh yes, that makes sense now. Look at the difference between the two equations. You'll notice is 10 less than the original expression. It could be written as which would represent the intersections between the graphs and
7. (Original post by Andy98)
Ahhh yes, that makes sense now. Look at the difference between the two equations. You'll notice is 10 less than the original expression. It could be written as which would represent the intersections between the graphs and
Thank you so much! I didn't notice that the equations were actually different! Makes complete sense now, thank you really appreciate it
8. (Original post by emily380)
Thank you so much! I didn't notice that the equations were actually different! Makes complete sense now, thank you really appreciate it
Yeah, it is a subtle difference.

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