Can All quadratic equations written in standard form be factored into intercept/factored form prove

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

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?