(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I'm trying to reverse the order of integration of

[tex]\int_0^{81}\int_{y/9}^{\sqrt{y}} dx dy[/tex]

first integral is from 0 to 81

second integral is from y/9 to [tex]\sqrt{y}[/tex]

The problem is, I identified the inequalities for the regions of integration, but I'm having problems understanding how the graph is formed.

2. Relevant equations

3. The attempt at a solution

I understand the inequalities are y/9 < x < [tex]\sqrt{y}[/tex]

and 0 < y <81.

But I don't understand the graph.

x-axis is 0 to 9

y-axis is 0 to 81

y = x^2

y = 9x

And since according to the homework problem I'm doing, I can't progress the problem until I understand why the graph is so.

Also, can someone help me in formating the integrals in latex?

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# Homework Help: Understanding the graph for reversing an integral

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