Question

For B do i multiply the rate by the year or how much money they get by the year.

Answer 1

a) the bank is gaining 3 % every year so the rate of gain is constant.

thus, the graph or function is linear.

b) the equation is

$I=\frac{\text{PRT}}{100}$

here, p is the principal, R is the rate of interest and T is time period.