GOOD DAY MADAM
THE GRAPH ABOVE DEPTICTS THE ANNUAL EXPENDITURE OF US CONSUMERS ON CELL PHONES AND RESIDENTIAL PHONE SERCICES BETWEEN THE YEARS 2001-2010.
FIRSTLY ABOUT CELL PHONE SERVICES THE GRAPH SHOWS A STEADY INCREASE FROM 2001 YO 2010. WHICH IMPLIES THAT THERE IS A STEADY INCREASE INTHE USAGE...