2. The function h, defined by h(t) = at +b, where a and b are constants, models the height in centimeters, of the sunflower after t days of growth during a time period in which the growth is approximately linear. What does a represent?
A) The predicted number of centimeters the sunflower grows each day during the period.
B) The predicted height, in centimeters, of the sunflower at the beginning of the period
. C) The predicted height, in centimeters, of the sunflower at the end of the period.
D) The predicted total increase in the height of the sunflower, in centimeters, during the period.