Parker runs a farm stand that sells strawberries and peaches. Each pound of strawberries sells for $1 and each pound of peaches sells for $1.50. Parker sold 3 times as many pounds of strawberries as pounds of peaches and he made $54 altogether. Graphically solve a system of equations in order to determine the number of pounds of strawberries sold, x, x, and the number of pounds of peaches sold, yy.