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

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The discussion centers on the absence of the point (0, -3) in the initial graph of a traveling sinusoidal wave. Participants question why this point was not included and why a y versus time graph was not utilized. Clarifications are sought regarding the significance of units in the context of the problem. The conversation highlights the importance of understanding the wave equation and its parameters. Ultimately, the initial omission of (0, -3) raises questions about the completeness of the graph representation.
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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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