During the summer, Gavin tutors and Eva washes cars. To show their earnings, Gavin makes a graph and Eva makes a table. Who earns more money per hour, and by how much more?

The information you have given is incomplete. However, if you consider this scenario happening in reality, Gavin would earn more than Eva. This is because tutor rates are usually given by the hour while car washing only involves the presence of customers that are not consistent.