How to write a lazy equation and sketch a graph

Amaple syrup producer records th amount of sap collected from each of his trees. the line plot shows the results for one day. what is the least amount of sap any one tree produced?

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?