Can somebody solve this for meee? i don’t get it, thanksss

Which facts are true for the graph of the function below? check all that apply. f(x) = log8 x. (30 points pls )

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Which system of linear inequalities is represented by the graph?