Question 1010794: 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 480 minutes, the monthly cost will be $280. If the customer uses 980 minutes, the monthly cost will be $530.
A) Find an equation in the form y=mx+b, where x is the number of monthly minutes used and y is the total monthly of the Ringular plan.
Use your equation to find the total monthly cost if 916 minutes are used.
Answer: If 916 minutes are used, the total cost will be
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 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 480 minutes, the monthly cost will be $280. If the customer uses 980 minutes, the monthly cost will be $530.
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2 points:: (480,280) and (980,530)
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A) Find an equation in the form y=mx+b, where x is the number of monthly minutes used and y is the total monthly of the Ringular plan.
slope = (530-280)/(980-480) = 250/500 = 1/2
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y = mx + b
Solve for "b"::
530 = (1/2)980 + b
530 = 490 + b
b = 40
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Answer:: y = (1/2)x + 40
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Use your equation to find the total monthly cost if 916 minutes are used.
Answer: If 916 minutes are used, the total cost will = (1/2)916+40
= 458+40 = $498.00
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Cheers,
Stan H.
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