a diver stands at the end of a diving board and jumps off into the water. The path of the diver is modeled by the function h(x)= -(x-2)2 + 9, where h(x) is the height above the water in feet, and x is time in seconds. Determine the new function that models the diver's jump after the following changes.

e. Is it possible for h(x) to undergo a reflection over the x-axis based on the context of the problem?

1 answer

The original function modeling the diver's jump is given by:

\[ h(x) = -(x - 2)^2 + 9 \]

This function describes a downward-opening parabola, which represents the trajectory of the diver as they jump off the board and fall towards the water.

Reflection over the x-axis: To reflect a function over the x-axis, you multiply the entire function by -1. So, the reflected function would be:

\[ h_{reflected}(x) = -h(x) = -[-(x - 2)^2 + 9] = (x - 2)^2 - 9 \]

Context Consideration: In terms of the context of the problem, reflecting the function over the x-axis means that the heights would then be negative, which does not physically represent the situation of a diver jumping into the water. Instead, it would suggest that the diver is "above" the water level in a sense that is not meaningful in the context of diving.

Generally, a reflection over the x-axis would indicate an inversion of the height—meaning that instead of falling into the water (where positive height means "above water"), it seems to imply the diver is somehow rising above a level where there is no physical interpretation of that scenario in real-world diving.

Thus, while mathematically it is possible to reflect the function over the x-axis, it is not contextually valid for modeling the real-world scenario of a diver jumping into the water. The height above the water cannot be negative after the diver jumps; their height should always be considered from a perspective where "0" height represents the water surface level.

Conclusion: So, while it is mathematically feasible to reflect \( h(x) \) over the x-axis, doing so does not align with the actual physical situation depicted in the problem. Therefore, it is not possible for \( h(x) \) to realistically undergo a reflection over the x-axis within the context of the diver's jump.