Prepaid Phone Card Credit Function

What did Keisha do with a prepaid phone card?

Keisha purchased a prepaid phone card for $25.25. Calls cost 25 cents a minute using this card.

What is the function to calculate the remaining credit on the card after x minutes of calls?

Keisha purchased a prepaid phone card for $25.25 and used it for calls costing 25 cents a minute. The function for calculating the remaining credit on the card after x minutes of calls is C(x) = 25.25 - 0.25x.

When Keisha bought a prepaid phone card for $25.25, she was able to make calls that cost 25 cents per minute. The function C(x) = 25.25 - 0.25x helps in determining the remaining credit on the card after Keisha has used it for x minutes of calls.

The initial balance of $25.25 decreases by 25 cents for each minute of calls made. Therefore, the function C(x) = 25.25 - 0.25x accurately represents the remaining credit left on the card after x minutes of calls.

This function is essential for Keisha to keep track of how much credit she has left on the prepaid phone card as she makes calls. By using this function, she can manage her call expenses effectively and ensure that she doesn't run out of balance unexpectedly.