The function modelled by the height (x) of the tree is as follows: y - 180 = (368 - 180)/(7 - 3) (x - 3) y - 180 = 47(x - 3) = 47x - 141 y = 47x - 141 + 180 = 47x + 39
Therefore, after 10 years, the tree will be 47(10) + 39 = 470 + 39 = 509 cm tall
Make them all fractions over 4, so 3 would be 12/4, and 1 1/4 would be 5/4 so add them together 12/4+5/4= 17/4 then divide by 4 to reduce it, to get 4 1/4
