Maya uses blue and orange fabric to make identical wall decorations. The graph bellow shows the relationship between the amounts of blue and orange fabric used. What is the constant of proportionality as shown in the graph? Explain how you know.

Answer:
For every 3 yards of blue fabric, there will be 7 yards of orange fabric.
Step-by-step explanation:
At (0.7,0.3), you can plot a point because it is the most exact.
This means (1.4,0.6), (7,3)