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Variable y varies directly with x2, and y = 196 when x = 7.

Enter the constant of variation in the quadratic variation equation.
Please! I really need help

Sagot :

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[tex]y=kx^2[/tex]
k - a constant

[tex]y=196 \ when \ x=7 \\ 196=k \times 7^2 \\ 196=49k \\ \frac{196}{49}=k \\ k=4 \\ \\ \boxed{y=4x^2}[/tex]
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