Proportional Relationships

I notice that there is a relationship between the x- and y-coordinates for the following graphs. How could you articulate this relationship?
Watch the following video to learn about Proportional Relationships.
Show what you know.
Using the GeoGebra tools, demonstrate your understanding of proportional relationships.
Tell me 3 things know about Proportional Relationships.
Complete the following task in your Math Journal.

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