SOLUTION: Debbie pays $0.55 per text and $1.25 per mb of data while roaming. She figures she can spend $25 per month on roaming. Attach a graph showing the relationship between the number

Question 1195781: Debbie pays $0.55 per text and $1.25 per mb of data while roaming. She figures she can spend $25 per month on roaming.
Attach a graph showing the relationship between the number of texts and data she can use for $25.
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
the equaton is:
.55x + 1.25y = 25
when y = 0, x = 25/.25
when x = 0, y = 25/1.25
replace x with any value between 0 and 25/.25 and solve for y in the equation.
replace y with any value between 0 and 25/1.25 and solve for x in the equation.
for example, when x = 20, the equation becomes .55 * 20 + 1.25 * y = 25
solve for y to get y = (25 - .55 * 20) / 1.25 = 11.2.
check the graph and you'll see that's true.
the graph is shown below:

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