If a jogger runs 2 miles and burns 185 calories, how many calories would he burn jogging 3 miles

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?

Construct the graph that models the given situation

Can someone explain to me how to do