Three years ago, Madison High School started
charging an admission fee for basketball games to
raise money for new bleachers. The initial price was
$2 per person; the school raised the price of admis-
sion to $2.50 this year. Assuming this trend contin-
ues, which of the following equations can be used
to describe c, the cost of admission, y years after the
school began charging for admission to games?