Standing Waves: Linear Mass Density of a String?

[InvalidID]

I'm working on my physics lab and I'm confused by the equation that they provide.

$$μ=\frac { 1 }{ { (2Lslope) }^{ 2 } }$$

What exactly does slope represent here?

Also, what is the typical linear mass density of a string? I'm getting 0.673 grams per meter. Is this right?

Edit: Never mind about my first question. I get it now.

 

[voko]

It is impossible to say anything about the first question. All background info is missing.

The second question - you could answer it yourself. A string is a cylinder. Pick some small radius, which would be "typical" for you, find out the volume of the 1-meter cylinder, then find out the mass using the density of the material of the string.