please helpp im clueless!! is this graph proportional or non-proportional??? giving 45 points PLEASE QUICK

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18

Which strategy is used by public health to reduce the incidence of food poisoning?

What is the interquartile range (iqr) of the data set represented by this box plot?