\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Mark is preparing a solution for an experiment. The table below shows the number of milliliters of chemical A (\(\textcolor{colordef}{x}\)) needed for a certain number of milliliters of the solution (\(\textcolor{colorprop}{y}\)).
Milliliters of chemical A (x) \(\textcolor{colordef}{4}\) \(\textcolor{colordef}{8}\) \(\textcolor{colordef}{12}\)
Milliliters of solution (y) \(\textcolor{colorprop}{6}\) \(\textcolor{colorprop}{12}\) \(\textcolor{colorprop}{18}\)
Calculate the coefficient of proportionality.