Tickets to a basketball game can be ordered online for a set price per ticket plus a $5 service fee. The total cost in dollars for ordering 5 tickets is $110.00. Which linear function represents c, the total cost, when x tickets are ordered?
c(x) = 5 + 21x
c(x) = 5x + 21
c(x) = 5 + 25x
c(x) = 5x + 21x