Question #8984a

1 Answer
Jan 24, 2018

C(y)=30y4

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,
y4=q Substitute in Cost function,
C=30q
Or,C=30y4
Hence Only variable is y that is no. Of guest. So
C(y)=30y4