Charts are usually used for showing continuous changes in the data over a period of time or some
trends. The coordinate system is usual: categories are spread along the horizontal X axis and the
values shown on the vertical Y axis.
This line chart is completely monochrome. In some cases, we need to print a chart or make it fully
accessible by people who have got problems with color perception. In bar, area or column charts hatch fills are
used, but we cannot make the same for the Line Charts, as Lines can't be hatch filled. When monochrome line
series are only colored with hues of a monochrome palette, the difference between them is not very notable -
of lines: dashed and solid work much better.
Line charts show the problems of the ACME Corp. during the year. Months, which are categories, are spread
along the X axis, the values – a number of unpleasant cases – along the Y axis. The crosshair is
enabled; all points of the year selected by the crosshair are being hovered and marked, tooltips are shown
for each series separately. The stroke settings for each series are modified, so the Purchase Return series
is solid black, the Delivery Failure series is colored in dark gray and stroke is modified so it looks as
long dash - short dash; the Order Cancellation series is dashed and in light-grey color.