Question #8984a

1 Answer
AJ
Jan 24, 2018

#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#

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