SOLUTION: A phone company has a monthly cellular data plan

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Question 1196855: A phone company has a monthly cellular data plan
Found 2 solutions by ikleyn, MathLover1:
Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

This post arrived with no question, therefore, I deleted it - - -

to teach you that including your question is a necessary part of your job, when you post to this forum.



Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

use given data to find linear equation
y=mx%2Bb

if a phone company has a monthly cellular data plan where a customer pays a flat monthly fee of $10,+b=10
and then a certain amount of money per megabyte (MB) of data used on the phone, x
If a customer uses x%5B1%5D=20 MB, the monthly cost will be y%5B1%5D=11.20.
If the customer uses x%5B2%5D=130 MB, the monthly cost will be y%5B2%5D=17.80}.
so, we have two points to find a slope

m=%2817.80-11.20%29%2F%28130-20%29=0.06
your equation is:
y=0.06x%2B10