Solve for x, given the equation square root x+9 − 4 = 1. x = 16, solution is not extraneous
x = 16, solution is extraneous
x = 34, solution is not extraneous
x = 34, solution is extraneous

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The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.