The charge for telephone calls T is partly constant and partly varies with the number N of units of call. The bill for 420 units of call is N806, while the bill for 200 unit is N410
A. Obtain the charge per unit of calls
AAAaannndd the bot gets it wrong yet again!
B is wrong. why?
B. Find the bill for 600 units of call
A. The charge per unit of calls is calculated by dividing the difference in the bills (806 - 410) by the difference in the number of units (420 - 200). This gives a charge per unit of N1.90.
B. The bill for 600 units of call is calculated by multiplying the charge per unit (N1.90) by the number of units (600). This gives a bill of N1140.