GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3
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4
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9
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18
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Detailed explanation-1: -First we have the equation 9=k/12. Then we solve for k which is the constant of the variation and that is 108. Next, we solve for y by using the equation y=108/27. Hence, the value for y is 4.
Detailed explanation-2: -When y varies inversely as x, y=kx, where k is some constant. By substituting y=−4 and x=16 we find that −4=k16 . Multiplying both sides by 16 gives k=−64 . Therefore, the answer is y=−64x .
Detailed explanation-3: -What is the inverse variation formula? The inverse variation is represented by x = k/y or xy = k.
Detailed explanation-4: -The main idea in inverse variation is that as one variable increases the other variable decreases, which means that if x is increasing y is decreasing, and if x is decreasing y is increasing.