The monthly cost, , in dollars, of a cell phone plan is a linear function of the number of minutes used, . The table shows the cost for two different usage amounts.
| Minutes Used (m) | Monthly Cost (C(m)) |
|---|---|
| 100 | 25 |
| 300 | 35 |
Based on this linear relationship, what is the monthly cost, in dollars, if 500 minutes are used?
35
40
45
50
