Final answer:
Company A charges a lower cost than Company B for any number of people.
Step-by-step explanation:
The fact that the graphs for the two catering companies never intersect indicates that Company A charges a lower cost than Company B for any given number of people.
Let's assume the cost per person for Company A is c1, and the cost per person for Company B is c2. Since the graphs never intersect, for any given number of people, the cost for Company A, represented by the equation 'c1 * number of people + fixed fee of $75', will always be less than the cost for Company B, represented by the equation 'c2 * number of people + fixed fee of $100'.
Therefore, Company A charges a lower cost than Company B for any number of people.