compare linear functions 1 with linear function 2. which one has the lesser initial value?

linear function 1: lionel's cell phone plan costs $45 per month
linear function 2: the relationship between the number of months Ruby has had her cell phone (x) and the total cost (y) is given by y = 40x + 60

linear function 1 has the lesser initial value , with an initial value equal to $45 while linear function 2 has an initial value equal to $60
linear function 1 has the lesser initial value , with an initial value equal to $0 while linear function 2 has an initial value equal to $60
linear function 2 has the lesser initial value , with an initial value equal to $40 while linear function 1 has an initial value equal to $45
linear function 1 has the lesser initial value , with an initial value equal to $0 while linear function 2 has an initial value equal to $40

The correct answer is: linear function 1 has the lesser initial value, with an initial value equal to $45, while linear function 2 has an initial value equal to $60.