A plant is growing at a constant rate. Its height, in inches, after weeks can be modeled by the equation , where is the current height. If the plant reaches a height of 17 inches, the equation becomes . Which of the following is the best interpretation of the number 1.5 in this context?
The initial height of the plant, in inches
The number of weeks it took for the plant to grow 17 inches
The rate at which the plant grows, in inches per week
The total height the plant grew
