The growth of the tree is modelled by the equation
h - 180 = (368 - 180)/(7 - 3) (t - 3)
h - 180 = 47(t - 3)
h = 47t - 141 + 180
h(t) = 47t + 39; where h(t) is the height of the tree in centimeters after t years.
Therefore, after 10 years,
h(t) = 47(10) + 39 = 470 + 39 = 509 cm
