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Calculate the Average Rate of Change from $\displaystyle {x}={4}$ and $\displaystyle {x}={9}$ for the funcion $\displaystyle {f{{\left({x}\right)}}}={5}+\frac{{6}}{{7}}{x}$ .

$\displaystyle \frac{{7}}{{6}}$
$\displaystyle -\frac{{30}}{{7}}$

$\displaystyle {5}$
$\displaystyle \frac{{6}}{{7}}$

$\displaystyle \frac{{30}}{{7}}$

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