To find the constant of proportionality, you can set up the equation \( \frac{y}{x} \). The constant of proportionality is the value you get when you divide \( y \) by \( x \) for each pair of numbers in your table.
Let's calculate \( \frac{y}{x} \) for each of the given pairs:
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For \( \frac{1}{4} \):
- If \( x = 1 \) and \( y = 4 \): \( \frac{y}{x} = \frac{4}{1} = 4 \)
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For \( \frac{4}{1} \):
- If \( x = 4 \) and \( y = 1 \): \( \frac{y}{x} = \frac{1}{4} = 0.25 \)
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For \( \frac{1}{8} \):
- If \( x = 1 \) and \( y = 8 \): \( \frac{y}{x} = \frac{8}{1} = 8 \)
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For \( 8 \):
- If \( x = 8 \) and \( y = 1 \): \( \frac{y}{x} = \frac{1}{8} = 0.125 \)
Now, to find if any of these pairs share a constant of proportionality, we identify the ratio:
- \( \frac{4}{1} = 4 \)
- \( \frac{1}{4} = 0.25 \)
- \( \frac{8}{1} = 8 \)
- \( \frac{1}{8} = 0.125 \)
None of the ratios are equal; thus, there's no single constant of proportionality among the presented pairs. Therefore, to select an answer, please clarify if you're looking for the calculation for a specific context or a choice of answer based on proportional relationships.