Omar will donate up to $500 to charity. the money will be divided between two charities: the city of youth fund and educational growth foundation. omar would like the amount donated to the educational growth foundation to be at least four times the amount donated to the city youth fund. let x denote the amount of money ( in dollars ) donated to the city youth fund. let y denote the amount of money ( in dollars ) donated to the educational growth foundation. shade the region corresponding to all values of x and y that satisfy the requirements.