You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. You use your data to create a plot of wavelength (in m) vs inverse frequency (in s) and the linear fit of your graph gives a slope of 17.40 ± 1.117. What is the linear mass density of the string, including its uncertainty?
__________ +/- _________.