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Variation and Problem Solvong

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Question
Answer
Tips- (DIRECT VARIATION)When substituting into the proportionality equation, remember to always stay consistent.    
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Tips- Do not confuse direct variation with inverse variation.    
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Step 1- write down equation y=kx    
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Step 2- Substitute the values of each variable into the equation    
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Step 3- Divide both sides of the equation x to solve for k    
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Step 4- Rewrite the direct variation equation using the value of the proportionality constant.    
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Step 5- substitute the value given in the second part of the problem into the new equation    
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Step 6- perform the indicated computations .    
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Tips- (INVERSE VARIATION)- remember as one increases the other decreases, or vice versa.    
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Step 1- analyze your data    
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Step 2- Express known and unknown values in an inverse variation equation    
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Step 3- plug in the value for "k" and solve for "F"    
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Tips- (JOINT VARIATION) remember that constant variation is a number that relates to how the value of one mathematical variable changes as another mathematical variable increases.    
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step 1- read the question being given carefully, noting which variables vary directly with which other variables    
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step 2- calculate the constant of variation by dividing the dependent variable by the independent variable.    
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step 3- finish solving the constant of variation problem    
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Read section 8.4 in Pearson for additional help    
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