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janell dale

variation and problem solving

QuestionAnswer
direct viration In direct variation, as one number increases, so does the other. This is also called direct proportion: they're the same thing. y varies directly as x, or y is directly proportional to x, if there ia a non-zero constant k such that - y=kx
inverse variation In inverse variation, it's exactly the opposite: as one number increases, the other decreases. This is also called inverse proportion. y varies inversely as x, or y is inversely proportional to k - y=k/x
joint variation In joint variation the ratio of a variable y to the product of two or more variables is constant, then y varies as, or is jointly proportional to the other variable - y=kxz
constant of variation the number k is called the constant of variation or the constant of proportionality
divide and conquer The best way to approach word problems is to “divide and conquer”. Break the problem down into smaller bits and solve each bit at a time.
understanding the problem what are they asking? Look for clues in the problem to determine which form of variation
translate/interpret translate the word problem into equation(s) with variables
solve find the solution(s) to the word problems.
Created by: gdalesgirl