Evaluate f (-2) when f(x) = 5x + 3

You have to put -2 in as x for the equation.

f(-2) = 5(-2) +3
f(-2) = -10 +3
f(-2) = -7

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.