The line graph below shows the number of pre-teens 9 through 13 in Aurora that have cell phones. line graph with the values (9, 120), (10, 200), (11,80), (12, 500), and (13,750) plotted representing ages and number of cell phones

At what age do children have the greatest number cell phones?

At what age do children have the least number of cell phones?

How many cell phones do 10 year olds have?

The biggest increase in number of cell phones happens between the ages of