A set of steps leads down into a swimming pool. Some of the steps are above the water level and some of the steps are below the water level. The top of one of the steps is even with the water level of the pool. Each step is 8 inches tall. Positions below the water level are represented as negative values and positions above the water level are represented as positive values. Madison's feet are on the step that is even with the water level of the pool. Madison steps 1 step down. (a) What numeric value represents the position of Madison's feet now?

(b) What is the additive inverse of "Madison steps 1 step down?" Describe the additive inverse in terms of the situation. Explain how you know this is the additive inverse.