A shopping club published an advertisement to help increase its membership. One month after the advertisement was published, the shopping club had 200 200 members. The number of members in the shopping club can be modeled by the equation y = 200 + 15 ( m − 1 ) y = 200 + 15 ( m − 1 ) for m ≥ 1 m ≥ 1 , where m m is the number of months after the advertisement was published, and y y is the number of members.