Hey lol Could you help me out with my little problem ;( Please explain your answer :D? (Maybe…?)

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x