Problema Solution
a long distance carrier charges $4.1 for one month service. additionally, the company charges $0.13 per minute of calling. Using a graph estimate how many long distance minutes someone could use in one month for a total cost of $18.00
Answer provided by our tutors
let
x = the number of minutes
y = the total cost
y = 4.1 + 0.13x
click here to see the graph of the function
the total cost is $18.00 means y = 18 thus on the graph we look for the value of x for which y = 18
x = 107 minutes