Mathematics
jachu
16

The phone company Ringular has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 420 minutes, the monthly cost will be $104. If the customer uses 720 minutes, the monthly cost will be $164. A) Find an equation in the form y=mx+b, y=mx+b, where x x is the number of monthly minutes used and y y is the total monthly of the Ringular plan.

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(1) Answers
KatriceLaigo

(420,104)(720,164) slope = (164 - 104) / (720 - 420) = 60/300 = 1/5 y = mx + b slope(m) = 1/5 (420,104)...x = 420 and y = 104 now we sub and find b, the y int 104 = 1/5(420) + b 104 = 84 + b 104 - 84 = b 20 = b so ur equation is : y = 1/5x + 20

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