The height of a plant, , in centimeters, days after it was planted, is modeled by the function . Which of the following statements is the best interpretation of the number 0.5 in this context?
The initial height of the plant in centimeters.
The total growth of the plant after days.
The average rate of growth of the plant in centimeters per day.
The number of days it takes for the plant to grow 10 centimeters.
