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.
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".
To truncate is to cut off a decimal number at a certain point without rounding.
Learn how to create stem-and-leaf plots and histograms in order to analyze data.