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prohojiy [21]
3 years ago
11

Help please! my teacher wants us to show how we got our answer

Mathematics
1 answer:
Mila [183]3 years ago
3 0

Direct variation is when \dfrac{y}{x} is the same for each coordinate.

Indirect variation is when x · y is the same for each coordinate.

11. Answer:  Direct Variation

<u>Step-by-step explanation:</u>

\begin {array}{c||c|c|c|c|c}x&12&18&23&29&34\\y&132&198&253&319&374\\\\\dfrac{y}{x}&\dfrac{132}{12}=11&\dfrac{198}{18}=11&\dfrac{253}{23}=11&\dfrac{319}{29}=11&\dfrac{374}{34}=11\\\end{array} \\\\\\\text{The coordinates x and y show a direct variation.}

12. Answer: Indirect Variation

<u>Step-by-step explanation:</u>

\begin {array}{c||c|c|c|c|c}x&4&6&8&8.4&12\\y&21&14&10.5&10&7\\x\cdot y&4\cdot 21=84&6\cdot 14=84&8\cdot 10.5=84&8.4\cdot 10=84&12\cdot 7=84\\\end{array} \\\\\\\text{The coordinates x and y show an indirect variation.}

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Z = 26.38

The 55th percentile is 26.38.

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