The water of a tank is initially 24 feet, and it is being drained at a rate of 3 feet per day. The

equation below expresses the water level, y, in feet, in terms of the number of days, x, since

the tank began draining.

y = 24 − 3x

A scientist might be interested in the x-intercept of this equation because it represents the

moment when the tank will be empty. Which of the following is the x-intercept of the

equation above