The phone company NextFell has a monthly cellular plan where a customer pays a flat monthly fee andthen a certain amount of money per minute used on the phone. If a customer uses 100 minutes, themonthly cost will be $61. If the customer uses 780 minutes, the monthly cost will be $333.A) Find an equation in the form y = = mx + b, where x is the number of monthly minutes used and y is thetotal monthly of the NextFell plan.B) Use your equation to find the total monthly cost if 980 minutes are used.