Final answer:
The value of 'y' in Juan's cell phone plan is $10.00.
Step-by-step explanation:
The question provides a table with information about Juan's cell phone plan.
The first column represents the number of minutes, while the second column represents the cost.
To find the value of 'y', we need to identify the corresponding value in the cost column for the given number of minutes.
By looking at the table, we can see that for 250 minutes, the cost is $12.50.
Therefore, the answer is option C) $10.00.