Hi.

Like the topic says I need help getting a value from anywhere on a graph I made from a Sigma formula.

The formula goes like this:

0

(Σ 50n)+100

n=9

Giving a start value off 100 and a final value off 2350.

Each point on the graph would be the formula given with n=0-9

Now comes the part where I have no idea what to do, or how to do it. I need to be able to find any value on that graph.

So if I needed to find the value for 5,5 or 7,25 , what would I have to do?

-Pus