Ill be on my way to success once Katie stops deleting my questions

Which term best describes the association between variables a and b

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Find the nonpermissible replacement for binthis expression.b2/5b +5