An electricity company charges its customers a base rate of$10 a month, plus 6 cents per kilowatt-hour (kwh) for the first1200 kwh and 7 cents per kwh for all usage over 1200 kwh. express the monthly cost as a function of the amount ofelectricity used. then graph the function e for 0 an electricity company charges its customers a bas x an electricity company charges its customers a bas 2000