Question

A telephone company makes up it's monthly bills as follows:a fixed charge of 800 naira plus a charge proportional to the number of units of call on the telephone.if it charges 2 naira per unit of call,calculate the total charge on
(a)80 units
(b)150units
(c)782units.

Answer 1

well, it is clear that y = 800 + 2x
so plug in the various values for x

Answer 2

Good

Answer 3

I did not understand anything. You did not even explain anything. Nothing was clear at all. Pls, more explanation.