Is y(t-x/v) a Valid Solution to the Wave Equation?

[JayKo]

Homework Statement

Show that y(t-x/v) is a solution of the wave equation without taking any partial derivatives (hint: use your knowledge about f(x-vt)).

Homework Equations

y(x,t)=y(x-vt)

The Attempt at a Solution

what exactly is y(t-x/v) means, from dimension analysis, its the function of y(t). but how on Earth this relate to y(x,t). rather confused of what this question is asking.

kindly show me how to kick start this.thanks.

 

[JayKo]

anyone know what this question means?