Question

Question #8984a

Answer 1

`C(y)=30y/4`

Explanation:

Let the function be C (y).
It costs $30 for 4 guest.
Let a variable `q` represent a parameter for guest and the cost.
Guest=`4`
Cost=`$30`
If no of guest is `8` then cost is `60`. Hence parameter `q` represent no of guest grouped in 4 and cost grouped in $30 per four guest.
Hence,
Guest (y)=`4q`
Cost(C)=`$30q`
Eliminating the parameter,
`y/4=q` Substitute in Cost function,
`C=30q`
`Or, C=30y/4`
Hence Only variable is `y` that is no. Of guest. So
`C(y)=30y/4`