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Answer :

Constant of proportionality is 0.20 because constant of proportionality is k=y/x so 1/5=0.20 or 0.2

Answer:

Step-by-step explanation:

y=kx

(5,1)

1=k*5

1/5=k*5/5

1/5=k

The constant of proportionality between y and x in this graph is  

1/5