I am doing a lab on quot;Standing Waves on a Stringquot;, and I am supposed to calculate linear mass density quot;u1quot; from the slope of f vs...

I am doing a lab on "Standing Waves on a String", and I am supposed to calculate linear mass density "u1" from the slope of f vs 1/L, and linear mass density "u2" from the slope of f vs sqrt(tension). How would I be able to calculate these two values (u1 and u2) from each of the plots?