How do u do this and solve this?

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.)

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Twelve less than a number is at most 20