Question

Ray's gym charges an initial sign-up fee of $25.00 and a monthly fee of $15.00.
Write a function that describes the gym's total membership fee for x months.

Answer 1

y=$15x+$25
25 represents the y intercept 
15 represents the amount per month that it is increasing

Answer 2

T=15x+25
15 times the the number of months plus $25 sign up fee equals total amount paid