Along with incomes, people's charitable contributions have steadily increased over the past few years. The table on the right
shows the average deduction for charitable contributions (in dollars) reported on individual income tax returns for the period
1993 to 1998. Find the average rate of change per year between 1995 and 1997.

Year. Charitable
1993. 1770
1994. 2400
1995. 2470
1996. 2760
1997. 3070
1998. 3150


A.$300
B.$600
C.$335
D.340