Pregunta
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If the formula \( y=x^{3} \) is changed by adding five as shown in red below. \( f(x)=(x+5)^{3} \) Which values would be most directly affected by the change?

Ask by Chandler Ray. in the United States
Mar 01,2025

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The x-values, especially the x-intercept, are most directly affected by the change.

Solución

When we change the formula from y = x³ to f(x) = (x + 5)³, the addition of 5 inside the cube means that each x value in the original function is effectively replaced by (x + 5). This produces a horizontal shift of the graph. In particular: • In the original function y = x³, the x-intercept is at x = 0 (since 0³ = 0). • In the new function f(x) = (x + 5)³, the x-intercept is found by setting x + 5 = 0, which gives x = –5. Thus, the x-values, and especially the x-intercept, are the values most directly affected by this change.

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Beyond the Answer

This change shifts the graph of the function horizontally. Specifically, the transformation \( f(x)=(x+5)^{3} \) moves the graph of \( y=x^{3} \) five units to the left. This means that all x-values that yield the same y-value are affected, and the point that was originally at \( (0,0) \) in \( y=x^{3} \) will now be located at \( (-5,0) \) in \( f(x) \). Essentially, key characteristics like intercepts and turning points shift with this transformation. When examining the function, it’s important to remember that while x-values have adjusted, the shape of the graph remains cubic. The transformation affects where the function intersects the x-axis and its symmetry but will not alter the ultimate behavior of the cubic function, which still approaches infinity in both the positive and negative directions as x moves away from zero.

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