# If y=-6.3 when x=2/3, how do you find y when x=8 given that y varies inversely as x?

To find y when x=8, we can use the inverse variation formula: y = k/x.

First, we need to find the constant of variation, k.

Given that y = -6.3 when x = 2/3, we can substitute these values into the formula: -6.3 = k / (2/3).

To solve for k, we can multiply both sides of the equation by (2/3): -6.3 * (2/3) = k.

Simplifying, we get: -4.2 = k.

Now that we have the value of k, we can substitute it back into the inverse variation formula: y = -4.2 / x.

To find y when x = 8, we substitute x = 8 into the formula: y = -4.2 / 8.

Simplifying, we get: y = -0.525.

Therefore, when x = 8, y is equal to -0.525.

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Known condition:

But 2 will divide exactly into 10 by 5 and 3 will divide exactly into 63 by 21 giving:

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