Which function rule models the function over the domain specified in the table below?
i
i
x
-7
1
3
4
7
f(x)
-11
1
9
11
17

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.