In 2012, there were approximately 275 students in the Delaware High School band. In 2018, that number increased to 305. Find the annual rate of change in the number of students in the band.

It is five more people joining the band every year. This is because there was an increase of 30 people, over a six year period. You then have to divide thirty by six to get the change rate of 5 more people in the band each year