The number of tiles needed is proportional to the area in square feet. This graph shows this relationship. Select from the drop-down menu to correctly complete the statement. The unit rate is Choose... . A line graph, titled Tiles Needed, representing the relationship between square feet and tiles. The following points are plotted 0 comma 0, 1 comma 36, and 6 comma 216.. A line is drawn through the points, starting at the origin.