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

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


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