# Thread: Area under amplitude over frequency graph

1. ## Area under amplitude over frequency graph

Hi,

I have a graph with a frequency on the x axis and power density on the y axis. Both scales are logarithmic, and the graph shows a straight line between the points (110Hz, 0.001V^2/Hz) and (200Hz, 0.004V^2/Hz). I need to work out the area under this portion of the graph as it relates to total power.

So, my understanding is I need to find the function of the line, then set up and evaluate a definite intergral between 110Hz and 200Hz. My real question is, how do I work out the function of the line, and is this a correct method?

Thanks

Rob

2. ## area under log-log straight line graph

Ok, lets make this simple, how about helping me find the area under a log-log straight line graph?