Can someone me with these questions?

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

Solve the word problem. the table shows the low outside temperatures for monday, tuesday, and wednesday. by how many degrees did the low temperature increase from monday to tuesday? this function table shows the outside temperature for a given a. 21.1⁰ b. 8.6⁰ c. 4.9⁰ d. 3.9⁰(the picture is the graph the the question is talking about.)

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?