This table represents a proportional relationship between x and y. x 0 3 6 19
y 0 4 8 12

What is the constant of proportionality, k?

Enter your answer as a simplified fraction in the box.
k =

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days