To draw the Hi Lo graph:
A B C D E F G 1 1 2 3 4 5 6 7 2 28.1 28.6 30.7 31.5 31.8 33.0 32.2 3 27.5 28.6 29.3 30.1 31.2 32.2 30.7 4 25.3 27.5 27.8 29.2 29.2 31.3 30.5
Unlike a line graph, this graph contains a series of isolated vertical lines each of which has a small horizontal tick. The horizontal ticks are placed according to the values in row 3 of the spreadsheet. The lower and upper bounds of each vertical line are determined by the data in rows 2 and 4, respectively. The horizontal location of each mark is set by the values in row 1. You could have created this Hi Lo graph by arranging the data into columns.
Just as with line and bar charts, Hi Lo graphs can show multiple sets of data.