Certified Internal Auditor (CIA) Part 2: Practice of Internal Auditing — Question 52

A recent survey indicated that residents of a small town take the train to a nearby city eight times per month, on average. The same survey showed that the number of train trips that a resident takes per month (y) is determined by the number of days per month that the resident works in the nearby city (x), according to the equation: y = 2 + 2x. A person who never works in the nearby city is expected to take the train:

Answer options

• A. Zero times per month.
• B. Two times per month.
• C. Four times per month.
• D. Eight times per month.

Correct answer: B

Explanation

The correct answer is B because if a person never works in the nearby city, x equals 0. Plugging this into the equation y = 2 + 2(0) results in y = 2, meaning they would take the train two times per month. The other options are incorrect as they do not align with the calculated value based on the equation.