Table 2.

Analysis grid for scoring constructed diagrams.

Line	A line diagram consists of line segments or rectangular forms (tapes, bars) representing quantities. Two or more segments should be aligned so that their lengths can be compared. Segments without units or scales such as in geometric shapes or pictures should not be counted as a line diagram.
Table	A table contains at least two arrays of numbers resulting in a matrix of at least two by three (2 × 3) cells. A table need not have a legend, labels, or borders. A 1×2 or 2 × 2 table or an incomplete table (< 6 cells) should not be counted as a table.
Graph	A graph is a Cartesian coordinate system for plotting at least two functions in which a quantity (cost, distance) varies in time. The points and lines do not need to be correct. An empty x-y plane without points or lines is not counted as a graph.
Illustration	Any other graphical or pictorial visual expression or depiction.