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In graph b, for x equals 0, the x axis displays the temporal period T, with values from 0 to start fraction 3T over 2 end fraction. The y axis displays the values from negative A to A. The sinusoidal wave starts from (0, A), and passes through (start fraction T over 4 end fraction, 0), (start fraction T over 2 end fraction, negative A), (T, A), (start fraction 5 T over 4 end fraction, 0), (start fraction 3 T over 2 end fraction, negative A). The distance from start fraction T over 2 end fraction to start fraction 3 T over 2 end fraction is labeled T.