Question

formula of variation

Answer 1

Direct Variation. Since K is the constant (the same of every point), we can find K when given any point by dividing the Y-coordinate by the X-coordinate. For example, if Y varies directly as X, and Y=6 when X=2, the constant of variation is k=3. Thus, the equation describing this direct variation is Y=3X.

Answer 2

$\large\red\maltese\large\text{Formula\ for\ variation}$

$\text{ \cdots\longrightarrow\boxed{V(x)=E(x^{2})-\{E(x)\}^{2}} }$

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$\blue\bigstar\text{\green{Formula\ for\ standard\ deviation}}$

$\text{ \cdots\longrightarrow\boxed{\sigma=\sqrt{V(x)}} }$

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$\pink\bigstar\text{\red{Formula\ for\ arithmetic\ mean}}$

$\text{ \cdots\longrightarrow\boxed{\text{(A.M.)}=\dfrac{1}{n}\displaystyle\sum^{n}_{i=1}a_{i}} }⋯$

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