Question

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

Answer 1

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.

Answer 2

AAAaannndd the bot gets it wrong yet again!


B is wrong. why?