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Which of the following describes the graph of y = ∛(8x - 64) - 5 compared to the parent cube root function?

A) Stretched by a factor of 2 and translated 64 units right and 5 units down.
B) Stretched by a factor of 8 and translated 8 units right and 5 units down.
C) Stretched by a factor of 2 and translated 8 units right and 5 units down.
D) Stretched by a factor of 8 and translated 64 units right and 5 units down.

1 Answer

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Final answer:

The graph of y = ∛(8x - 64) - 5 compared to the parent cube root function is transformed by being stretched by a factor of 8, translated 8 units to the right, and 5 units down.

Step-by-step explanation:

The graph of y = ∛(8x - 64) - 5 is transformed compared to the parent cube root function, y = ∛x. First, we look at the factor in front of 'x'. In the expression 8x - 64, '8' indicates a stretch factor, so the graph is stretched by a factor of 8. Next, you need to identify the translations. The term '-64' inside the cube root suggests a horizontal shift, and since we are subtracting from 'x', this will be a rightward shift.

To determine the exact translation, we set the inside of the cube root to zero: 8x - 64 = 0; solving for 'x' gives us 'x = 8', which means the graph is translated 8 units to the right.

Lastly, the '-5' outside of the cube root affects the vertical translation, moving the graph downwards by 5 units.

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