Jana earns $25 per week for mowing the lawn and deposits the money into her savings account. The amount of money in Jana’s account can be represented by the equation y = 25x + 125, where x is the number of weeks she has been mowing the lawn. What does the y-intercept of the graph represent in this situation? Choose from the options below.
a the amount of money Jana has after she mows 5 lawns
b the amount of money Jana earns mowing each lawn
c the amount of money in Jana's account before she began mowing lawns
d the amount of money Jana deposits into her savings account after 1 week of mowing lawns