X::Y
20::25.6
40::6.4
60::2.6
80::1.8
100::1.2
How do I graph that and write a relation between Y and X?
I can see an approximate pattern here.
$\displaystyle \frac{f(20)}{4}\approx{f(40)}$
$\displaystyle \frac{f(40)}{3}\approx{f(60)}$
$\displaystyle 2$
$\displaystyle 1$
$\displaystyle ?$
I'm not sure what it means, but maybe I've helped. Don't you have a graphing utility with regression capabilities?