Answer:
The subscription began about 10 days before the 15th of the month.
Step-by-step explanation:
The correct option is:
The subscription began about 10 days before the 15th of the month.
The reason for being charged $60 instead of $45 which is the monthly rate is that they started the subscription prior the the cycle date of the bill period. Due to the change in the cycle date, the customer is getting a prorated charge for the days that had service prior to the date of the bill and current cycle starting
You need to isolate y. When you do, will get y=(4/3)x-2. When the equation is in this form, you can see that the slope is 4/3
