Respuesta :

K=4.5
X multiplied by 4.5 equals y, meaning the constant of proportionality is 4.5

Answer:

4.5

Step-by-step explanation:

y=kx

If we take the the first x and y values:
x=2, y=9

9=k×2

9÷2=k

4.5=k

k=4.5

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