Christopher wants to join a basketball team but each member has to pay a $300 yearly membership fee. The organization will allow Christopher to pay $15 monthly until he pays off his membership. However, he must pay a $150 deposit down first. Christopher puts the $150 deposit down and will begin paying the $15 fee monthly on April 1st. write a linear equation that will help us find out how many months it will take for Christopher to pay off his entire membership.