Final answer:
To determine the charges for his tutoring jobs quickly, Tony can use an equation that expresses the total cost in terms of the number of hours required for the job.
Step-by-step explanation:
In the given question, Tony needs to determine a rate for his tutoring jobs so that he can calculate the charges quickly. To do this, he can use an equation that expresses the total cost in terms of the number of hours required to complete the job.
For instance, in Example 12.4, Svetlana charges a one-time fee of $25 plus $15 per hour of tutoring. The equation that expresses the total amount of money she earns for each session is y = 25 + 15x, where x is the number of hours.
Similarly, Tony can come up with his own equation based on the specific rate he decides, allowing him to easily determine the charges for his tutoring jobs.