The height of a particular tree, in feet, can be modeled by the function defined by , where is the height of the tree months after it was planted. Of the following, which is the best interpretation of the equation ?
The tree is predicted to be 24 feet tall after 21.8 months.
The tree is predicted to be 21.8 feet tall after 24 months.
The tree is predicted to grow 21.8 feet in the first 24 months.
The tree was 24 feet tall when it was 21.8 months old.