A table showing the number of times a particular category appears in a data set is a frequency distribution.
A histogram is a bar chart that describes a frequency distribution.
A stem-and-leaf plot is a way of organizing data values from least to greatest using place value. Usually, the last digit of each data value becomes the "leaf" and the other digits become the "stem".
Bins are groups of data plotted on the x-axis.
Continuity for a point exists when the left and right sided limits match the function evaluated at that point. For a function to be continuous, the function must be continuous at every single point in an unbroken domain.
To truncate is to cut off a decimal number at a certain point without rounding.