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Question 390808: A cellular phone plan costs $20 per month, including 120 minutes of air time. After that, you are charged $0.35 per minute.
Write an equation in slope-intercept form to describe the monthly cost of the phone plan, y. Let x=the number of minutes you use over 120 minutes.
Answer by mananth(16946)   (Show Source):
You can put this solution on YOUR website! A cellular phone plan costs $20 per month, including 120 minutes of air time. After that, you are charged $0.35 per minute.
Write an equation in slope-intercept form to describe the monthly cost of the phone plan, y. Let x=the number of minutes you use over 120 minutes.
...
fixed amount = $20
per minute = $0.35
number of minutes over 120 calls = x
..
y = 20 +0.35x
y = 0.35x+20
...
m.ananth@hotmail.ca
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