How much does this tree grow each year, based on this model? Since this is about how the output (the height) changes based on the input (time), this is a question about slope. Slope is how much the output changes when you increase the input by 1. In our context, that would be how much the height changes during one year, which is exactly what the question is asking. So, the answer to this question is just 7.3 inches.How tall is the tree when it produces its first fruit? In the information we are given, we are told that t is the number of years after producing its first fruit. So, it produces the first fruit when t=0. Therefore, the answer to this question is the output (the height) when t=0. Since h(0)=7.3(0)+81=81, the tree is 81 inches tall when it produces its first fruit.Based on this model, how tall do you expect the tree to be 50 years after it produces its first fruit? Since the inputs to this function are years after producing the first fruit, and the outputs are height, this question is asking what the output is when the input is 50. In otherword, this question is looking for h(50), which we know how to find by pluggin in: h(50)=7.3(50)+81 = 446.