To establish a formula for the frequency of vibration f in terms of length l, tension T, and mass per unit length m, it is suggested to use dimensional analysis. The relationship can be expressed as f = μ^α * l^β * T^γ, where μ represents mass per unit length. The dimensions on both sides of the equation must match, with frequency having dimensions of [T]^-1. For those studying waves, it is recommended to consult relevant sections in textbooks for a deeper understanding. This approach will help clarify the dependencies of frequency on the given parameters.