Tell whether the x- and y-values in the table show a proportional or non-proportional relationship. If the relationship is proportional, tell the rule. Select one: 
aProportional; x = 3/7y
bNon-proportional 
cProportional; x=1/3y
dProportional; x=2/5y
                                             
                                          
                                          
                                       