Object a started its journey at 12 p. m. the distances traveled by object a at different times are shown below: 13 miles at 1 p. m. 26 miles at 2 p. m. 39 miles at 3 p. m. 52 miles at 4 p. m. the graph shows the distances traveled by object b at different times. a distance versus time graph is titled object b and it is a line with steps passing through the points 0, 0 and 1, 10 and 2, 10 and 3, 20 and 4, 20 and 5, 50 which object travels at a constant speed? object b, because the graph has several straight lines object b, because its graph starts from origin and moves up steadily object a, because its graph is a curve which does not start from origin object a, because it travels equal distances in equal intervals of time