abscissa
the horizontal axis (or x-axis) on a graph
ordinate
the vertical axis (or y-axis) on a graph
discrete data
data sets where there are no possible measurements in between any two adjacent data points on the x-axis
continuous data
data sets where any number of observations between any two adjacent categories on the x-axis are possible
scatterplot
a graph showing the relationship between two variables
time series graph
a graph showing change in a quantitative variable over time