Calculating Alpha: Intercept & K

[nothingatall]

Homework Statement

calculate alpha using the intercept and the value of k.

Homework Equations

T= 2pi*(m+(alpha)mspring)/k)^1/2

The Attempt at a Solution

my intercept i found using EXCEL was .228 and k=5kg/s^2 which I'm pretty sure i did wrong. But i don't know how my intercept would have anything to do with this. and where to plug the intercept into. My slope turned out to be S^2/ g when i was asked to graph T^2/ g. A little help? thanks

 

[pongo38]

What are your x and y axes? Can you attach the graph? Which one of Hooke's laws is relevant? Define alpha.