PLEASE I NEED HELP! Can someone just explain how they got blue in a equation form?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

There is an entrance to the computer room at point e which lies on ab and is 5 feet from point a. plot point e on the coordinate plane. find the distance from the entrance at point e to the printer at point e