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2014-11-26T18:39:42+08:00
In direct variations, the formula is y=kx In indirect variations, the formula is y=k/x Where: y is a number, x is a number, and k is a constant Examples: 1.Direct Variation If y varies directly as x, and y = 8 when x = 12, find y when x=2. a. Substitute the values to the formula to get the value of the constant. y=kx 8=k(12) k=8/12 or 2/3 b. We already got the constant, so we can now get the value of the missing y. y=kx y=(2/3)(2) y=4/3 So, this is the answer. 2. Indirect Variation If y varies indirectly as x, and y = 8 when x = 12, find y when x=2. a. Substitute the values to the formula to get the value of the constant. y=k/x 8=k/12 k=(2)(12) k=24 b. We already got the constant, so we can now get the value of the missing y. y=kx y=24/2 y=12 So, this is the answer. ∞Indirect Variation is also called as Inverse Variation∞
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