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Physics, Chemistry and Biology: Post your doubts here!

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I have chemistry paper 6 tomorw and i need urgent help they r asking me to draw two intersecting straight lines in the graph? How to do tht? I can only see all the points fitting into a single line. how to do the 2 intersecting lines?
Which paper r u talking abt??
Anyways it's mostly like this:
image.jpg
image.jpg
 
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I was wondering.
If we add an acid to potassium manganate (VII).... does it turn from pink to colourless?

This usually happens in case of Alcohols only reacting with Acidified H+/KMno4 turning from Pink to Colourless.
It's a distinctive property of reaction for alcohols and the most famous.

Although I think it gives the same result when acid is reacted with KMnO4
 
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When we draw 2 intersecting lines... should we extend the 2 lines till the edge of the grid.
or only till where the points are..
does it even matter?
 
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