\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Dans ce tableau de proportionnalité,
\(\textcolor{colordef}{x}\) \(\textcolor{colordef}{2{,}5}\) \(\textcolor{colordef}{5}\) \(\textcolor{colordef}{7{,}5}\)
\(\textcolor{colorprop}{y}\) \(\textcolor{colorprop}{6{,}25}\) \(\textcolor{colorprop}{12{,}5}\) \(\textcolor{colorprop}{18{,}75}\)
calcule le coefficient de proportionnalité.