Question 1190772
i understand this as:


monthly charge is 200.


this is paid regardless of the number of kilowatt hours used.


the per kilowatt charge is 1.25 for the first 600 kilowatt hours and 2.51 per kilowatt hour for any kilowatt hours over 600.


with that understanding.....


if you used 599 kilowatt hours in a month, then your monthly charge would be 200 + 1.25 * 599 = 948.75


if you used 2600 kilowatt hours in a month, then your monthly charge would be 200 + 1.25 * 600 + 2.51 * (2600 - 600) = 5719.


the general equation would be a piecemeal function that would be:


c(x) = 200 + 1.25 * x for x <= 600.
c(x) = 950 + 2.51 * (x - 600) for x > 600.


the function would be applied as follows:


if x <= 600, then the first function would be applied.
if x > 600, then the second function would be applied.


when 599 kilowatt hours were used, the first function would be applied to get 200 + 1.25 * 599 = 948.75


when 2600 kilowatt hours were used, the second function would be applied to get 950 + 2.51 * (2600 - 600) = 5970.