Acollege student is looking at her monthly checking account records. on september 1, 2008, her checking account held a balance of $1,050. at the end of march 2009, her checking account held a balance of $800. what is the monthly rate of change for the student’s checking account over the period september 1, 2008 through march 31, 2009?
a. -1,850/7
b. -250/7
c. 250/7
d. 1,850/7