Topic: Problem with showing improper integral

I'm trying to visualise improper integral, e.g. for f(x) = x^(-2), I want to evaluate the area under the graph from 1 to a very large number. I know I should get 1, but as I try to key in the 'To' beyond a certain value (in this case beyond 410), I start to get areas larger than 1.
Has someone encountered this, and has some insights on this matter? Thanks!

Re: Problem with showing improper integral

Graph 4.4.2:

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Attachment icon integral.png 21.64 kb, 317 downloads since 2014-11-27 

Re: Problem with showing improper integral

Thank you!

Just realized why I didn't try the 'List of Functions' - I'm on Windows 8.1 and can't access any of the Help feature.

Re: Problem with showing improper integral

The help file should from Graph 4.4.2 should be working with Windows 8.1. But the help file in the beta version seems to be broken. I need to fix that.