 |
| ||
| |||
|
| Math Central | Quandaries & Queries |
|
Question from John, a student: Hello, AT&T charges $39.99 for 450 minutes per month. It charges 45 cents per minute over the 450 minutes. |
Hi John,
I would draw a graph with minutes on the horizontal axis and monthly charge on the vertical axis. From minutes = 0 to minutes = 450 the graph is a horizontal line at monthly charge = $39.99. At this point the line slopes upwards so that for each additional minute beyond 450 there is an added cost of $0.45.
My graph isn't to scale.
Penny
| ||
| ||
| ||
 |
 |
|
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.