Erin made a line plot of the amount of time she practiced shooting free throws each day in the past 10 days. : time spent practicing (hours): 1/4-0, 1/2- 1, 3/4-2, 1-3, 1 1/4-2, 1 1/2-1, 1 3/4-0, 2-1, 2 1/4-0: what is the difference between the greatest and least times Erin practiced shooting free throws?: 1 hour, 1 1/2 hours, 1 1/4 hours, 2 hours?