Ruby bought an animal bank for her nephew. she is the only one who puts money in the bank, and no money is taken out. the function f (v) = 10 + 2v describes the amount in the bank after v visits with her nephew. which statement is true?

a) ruby puts $2 in the bank each visit.

b) ruby puts $10 in the bank each visit.

c) there was $2 in the bank before the first visit.

d) there was $12 in the bank before the first visit.