**1. The problem statement, all variables and given/known data**

The function y(x, t) = Asin(kx−ωt+ϕ) where x is in metres and t in seconds for

(a) t_{p} = 3.5 s and (b) x_{p} = 3.7m

**3. The attempt at a solution**

I don’t even know where to begin.

I know λ = 2pi/k

this is really disorienting. In the first graph, I’m given t = 3.5.

A = 3

y(x,t) = 3sin(kx-3.5ω)

In the second graph, y(x,t) = 3sin(3.7k – ωt)

Really, I don’t know how should I get started and I’m really frustrated.

I’m asked to find the wavelength. Is it 7m based off the first graph or do I have to utilize t = 3.5 and x=3.7?

http://ift.tt/1ifaQaT