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# need help with differentiation pls!!?? MATHS watch

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1. so i know everything except for one little part of the question. if you would help me with this, it will be much appreciated.

find the gradient function dy/dx of y=3x-9
then find the gradient of the curve at the point x=2.

i know that the differentiated gradient function is 3. however i cannot find the gradient when x=2 because there is no x to plot 2 in

2. (Original post by papajani1234)
so i know everything except for one little part of the question. if you would help me with this, it will be much appreciated.

find the gradient function dy/dx of y=3x-9
then find the gradient of the curve at the point x=2.

i know that the differentiated gradient function is 3. however i cannot find the gradient when x=2 because there is no x to plot 2 in

If you post in the maths forum:
http://www.thestudentroom.co.uk/forumdisplay.php?f=38 you are more likely to get a reply

It may help to sketch the gradient function (y = 3). Then look at x =2 and look at what the y value is. Then conclude something about maps like y =5, x = 3 etc and their corresponding values.
3. (Original post by SeanFM)
If you post in the maths forum:
http://www.thestudentroom.co.uk/forumdisplay.php?f=38 you are more likely to get a reply

It may help to sketch the gradient function (y = 3). Then look at x =2 and look at what the y value is. Then conclude something about maps like y =5, x = 3 etc and their corresponding values.

Brill, thanks

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Updated: October 16, 2015
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