Why Wasn't (0,-3) Included in the Initial Graph of a Traveling Sinusoidal Wave?

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SUMMARY

The discussion centers on the absence of the point (0, -3) in the initial graph of a traveling sinusoidal wave described by the equation y = Asin(kx - ωt). Participants questioned the lack of this point and the choice of graphing y against time. The conversation highlights the importance of specifying units in mathematical problems, as noted by user @BvU, and acknowledges a misunderstanding by user Callum regarding the initial conditions of the wave function.

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Homework Statement
Please see below
Relevant Equations
y = Asin(kx - ωt)
For part(a) of this problem,
1670534765621.png

The solution is,
1670534878264.png

However, why did they not have a point at (x,y) = (0, -3) initially? Also why did they not do a y against time graph?Many thanks!
 

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Callumnc1 said:
why did they not have a point at (x,y) = (0, -3) initially?
You sure they don't ?

1670535884436.png

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Callumnc1 said:
Homework Statement:: Please see below
Relevant Equations:: y = Asin(kx - ωt)

However, why did they not have a point at (x,y) = (0, -3) initially?
Your question is meaningless without units. See query by @BvU.
 
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Sorry @kuruman and @BvU, I see my mistake.

Kind regards,
Callum
 
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