The graph of a direct proportion in math is a straight line. Call
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1. Label your x axis for the moles of reactant, and the y axis for the moles of product. 2. Run a variety of chemical reactions with different molar amounts of reactant (1 mole equals
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Method 1        Check that the ratio of y/x is constant. 2/1 = 2 4/2 = 2 6/3 = 2 8/4 = 2 So your data is in direct proportion. Method 2        When x = 1, y = 2. Then
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