Yelp regression interpretation

Hi fellow Codecademy students,

I’m currently working on the yelp regression project. I plotted 3 scatter plots x-axis being ‘average review sentiment’ (highest correlation) against yelp ratings (‘stars’ column) .

However, the graph came out completely different from my expectation (it has simple 9 straight lines) , thus i’m confused how to interpret it. How can I say average review sentiment is significantly important to predicting a yelp rating by looking at this kind of graph? Please help me on this!

Thank you so much for your help in advance!

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