Displacement of a traveling wave

[agadag]

Homework Statement

The displacement (in meters) of a wave is y = 0.13 sin(t - 3.82x), where t is in seconds and X is in meters.

(a) Is this wave traveling in the +x or -x direction?


1.+x direction.
2.-x direction

(b) What is the displacement y when t = 26.5 s and x = 6.4 m?

The Attempt at a Solution

The solution for part a is positive x direction
I cannot figure out how to do this problem at all. Professor did not cover this material and I have no background knowledge in vibrations or waves. I have been reading the chapter in the book, but it doesn't make any sense and doesn't have any equations. I'd really appreciate a good teacher right now. :)

 

[Delphi51]

I don't see any physics in this question! It is just some arithmetic work. You must substitute t = 26.5 s and x = 6.4 m into the equation
y = 0.13 sin(t - 3.82x)
and find the value of y.