We are given fix cost of renting a dance studio = $109.50 and
Variable cost per person attending the workshop = $15.
Let us assume there x number of people attain the workshop.
We can setup a linear equation as :
Total cost = Fix cost + Per person cost * Total number of people attain the workshop.
We are given maximum amount can be spend = $318.
Therefore,
318 = 109.50 +15x.
Subtracting 109.50 from both sides, we get
318-109.50 = 109.50-109.50 +15x
208.50 = 15x.
Dividing both sides by 15, we get
x= 13.9.
It's less than 14.