the phone company ringular has a monthly cellular plan where a customer plays a flat monthly fee and then a certain amount of money per minute used on the phone. if a customer uses 440 minutes, the monthly cost will be $251. if the customer uses 560 minutes, the monthly cost will be $311.

1.) find an equation in the form y=mx+b where x is the number of monthly minutes used and y is the total monthly cost of the ringular plan.

2.) use this equation to find the total monthly cost if 835 minutes are used.