Final answer:
The slope of the line is -2 and represents the rate of leakage.
Step-by-step explanation:
The correct answer is a) The slope of the line is -2 and represents the rate of leakage.
In this context, the slope of the line represents the rate of leakage of the liquid solution from the container. A negative slope indicates that as time increases, the volume of the liquid solution decreases. In this case, the slope of -2 means that for every unit of time that passes, the volume of the liquid solution decreases by 2 units.
Therefore, the slope of the line is -2 and it represents the rate of leakage.