A boy owes his grandmother ​$1000. She paid for his first semester at community college. The conditions of the loan are that he must pay her back the whole amount in one payment using a simple interest rate of ​%7 per year. She​ doesn't care in which year he pays her. The table contains input and output values to represent how much money he will owe his grandmother​ 1, 2,​ 3, or 4 years from now. Year Amount owed​ (in $)
1 1070
2 1140
3 1210
4 1280

A.
​Yes, because the rate of change is a constant ​$___
nothing per year.
B.​No, because the rate of change is ​$
nothing per year during the second year and ​$___
nothing per year during the third year.