Question

The table represents the cost to eat at a buffet-style restaurant. Number of Cost (C) People (p) (Including tax) 2 27.54 3 41.31 4 55.08 5 68.85 6 82.62 Which equation could be used to calculate the cost, C, for any number of people, p, to eat at the restaurant?

Answer 1

The cost when p=2 is 27.54

The cost when p=3 is 41.31.

The difference between costs when p=2 and p=3 is 41.31-27.54=13.77

The cost when p=4 is 55.08

The difference of costs when p=4 and p=3 is 55.08-41.31=13.77

Thus, for each additional person the cost is 13.77.

So if the total cost is C and number of people is p, the equation for total cost is

C=13.77p