Thread: Multiple simultaneous equations

Hi,
I apologize if I have this posted in the wrong section of the forum.

I need assistance in solving multiple simultaneous equations. I don't mind doing the hard work, I just need to be pointed in the right direction. Right now I don't have a clue how to solve this. I am a biologist and still have a lot to learn in maths.

Here is the problem:
X Y A
0.541856 0.171848 5
0.732858 0.402196 25
0.838236 0.597253 50
0.926462 0.797811 75
0.983306 0.950288 95
0.999894 0.999673 100
I have a relationship between X and Y, but I know that along certain points on that curve there are the values A.
So what I need to find is the equation which relates X and Y to equal A.
But I don't know where to start. I know this isn't a linear equation, and after that I'm stuck.

Any help would be greatly appreciated.
Cheers
Ado

Without some kind of restrictions on the kind of function, there are an infinite number of different answers to this.

Thanks for your reply.

I should have mentioned that both X and Y are between 0 and 1, and A is between 0 and 100.

Hopefully that helps...