X- axis is vehicle speed, with five entries ranging from less than 10 mph to more than 40 mph. Y axis is percent risk for pedestrians. Data is represented in two lines, one for risk of injury to pedestrian, which rises gradually until about 30 mph and begins rising sharply. A second lower line measures risk of pedestrian death, which rises shallowly from 0 to 20 mph, then more sharply to 40 mph , reaching 54%