Anumeha's fees = $35
No. of hours took to complete the task = 5hours
x = 5
y = 35
y = initial fee + (no.of hours) x (constant fee)
y = initial fee + (x) x (constant fee)
y = 10 + (xa)
35 = 10 + 5a
35 - 10 = 5a
25 = 5a
25/5 = a
5 = a
Therefore, y = 10 + xa
where a is the constant fee charged for each hour.