Which situation involves a change modeled by a negative number but an end result modeled by a positive number?

Jake started his hike at an elevation of 23 meters, traveled down the mountain and stopped at an elevation of –2 meters.
Marissa had $64 in her savings account. She then withdrew $20 to buy some sandals.
Lorelei owed her mother $15. She then got $10 in a birthday card from her grandmother.
Javier was scuba diving and swam up 6 meters from the ocean floor to sea level to reach his boat.

1 answer

The situation that involves a change modeled by a negative number but an end result modeled by a positive number is:

Marissa had $64 in her savings account. She then withdrew $20 to buy some sandals.

In this situation, the act of withdrawing $20 is represented by a negative change (−$20), but after the withdrawal, Marissa ends up with $44, which is a positive number ($64 - $20 = $44).