We know that the real number of tickets sold was within 35 tickets of 350.
"no more than 35" implies a difference less than or equal to 35, meaning we want to use ≤ in our equation.
The following absolute value inequality describes our ticket range:
|350 - x| ≤ 35
Plug a few numbers in for x to make sure this function makes sense:
x = 360
|-10| = 10 ≤ 35
x= 300
|50| > 35, does not comply with our inequality.
