Question

The cost of flying a family to New York is proportional to the number of family members. Which of the following graph best represents this scenario?

• A.
• B.

Answer 1

The correct option is B

As we know, the number of family members, travelling to New York, can be either $1$ or $2$ or any integral value; it cannot be a fraction. So, the number of family members can take only discrete integral values.

Now, the cost of fly is directly proportional to the number of family members. Hence, the cost of fly will increase as the number of family members will increase, and the corresponding graph will take only discrete values.

$\therefore$ The graph in option (b.) best describes the given scenario.