The equation d = 80t represents a proportional relationship, where d is distance in miles and t is time in hours. Which graph represents the proportional relationship? A line graphed on a coordinate plane begins at 0,0 and goes through 1,40. The x axis is labeled Time in hours and the y axis is labeled Distance in miles. A line graphed on a coordinate plane begins at 0,0 and goes through 1,60. The x axis is labeled Time in hours and the y axis is labeled Distance in miles. A line graphed on a coordinate plane begins at 0,0 and goes through 1,100. The x axis is labeled Time in hours and the y axis is labeled Distance in miles. A line graphed on a coordinate plane begins at 0,0 and goes through 1,80. The x axis is labeled Time in hours and the y axis is labeled Distance in miles