How graph a line from a word problem?

Grace has decided to donate up to 500 dollars to charity. She wishes to donate to two charities: the City Youth Fund and the Educational Growth Foundation. She would like to donate at least 80 dollars to the Educational Growth Foundation, and she 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 dollar amount donated to the City Youth Fund, and let y denote the dollar amount donated to the Educational Growth Foundation. Shade the region of the plane that represents all donation amounts satisfying Grace's wishes.