Plz answer this I need help it’s 15 points



Each year, the campers at Alvin's summer camp try to set that summer's record for finishing
the obstacle course as quickly as possible,
Record obstacle course completion times
Year Record time (minutes)
2007 - 29
2008 - 26
2009 - 26
2010 - 23
2011 - 26
According to the table, what was the rate of change between 2008 and 2011?
minutes per year