What is 6 ft over 8 yd in simplest fraction form

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip

Is the point (0, 8) on the x-axis or y-axis? how do you know?

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !