Evaluate f(x)= -6x + 12 when x= -3, x = 0 , and x = 1

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

Find the equation using the point (4,8)

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?