Hi I have this elbow plot that was created to select the K for clustering but I can't find a sound explanation of how to interpret this, all I ever see is a picture of an elbow with in plots with clearly defined flexions. I created the elbow plot and the silhouette plot and my interpretation was that k=2 was the ideal number of clusters based on this two but I not sure if this is the best interpretation elbow plot

Silhouette plot



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