Re: Area under a graph !help!

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#12

From: Robert Simon Martin
Date: Wed, 08 Mar 2000 00:00

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>Hi I've got my GCSE coursework due in on Monday,
>and I have no idea what the formula for the area under
>a curved graph is, eg. area when the x-axis ranges for 0-4,
>in the graph of the function y=x^2 (y=x squared)

First you need to *integrate* y=x^2, you do this by increasing
the power by 1 and dividing by the new power, so I=(x^3)/3. Now
you have to work out the value of this expression when x=4 and
subtract the value where x=0, this gives the area. ie.

A=(4^3)/3-(0^3)/3=4*4*4/3=21.3333...

Rob


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From: Robert Simon Martin <robNOroSPAM@rdale.force9.co.uk.invalid>
Subject: Re: Area under a graph !help!
Date: 2000/03/08
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