Chapter 1 - Expressions, Equations, and Inequalities - 1-2 Properties of Real Numbers - Practice and Problem-Solving Exercises - Page 17: 73

H

We can use the process of elimination. F doesn't work because 300 is already 40 dollars and the cost is steadily increasing based on the minutes. G doesn't work because 100 minutes costs 20 dollars, not 10. We can see this on the graph. Finally, I doesn't work because 200 minutes equals 30 dollars, not 35. We can also see this on the graph. This leaves H, which is the answer.