Answer
$y = 27x +3$
Domain: [10, 15] Range: [273, 408]
Work Step by Step
Between 10 and 15 students are expected to attend, so that is our domain. Tickets are 27 dollars per person (25 plus 2 surcharge)
Handling of 3 dollars per order
$y = 27x +3$
Let x = 10:
$y = 27*10 + 3$
$y = 270 + 3$
$y = 273$
Let x = 15:
$y = 27*15 + 3$
$y = 405 + 3$
$y = 408$
