The legend.
the x-axies
It is the legend or key.
legend
The label on the y-axis or vertical axis.
Trends are shown on line graphs by lines of best fit that are based on data points.
legend
legend
legend
the x-axies
The axis labels.
What part of a graph tells what the bars or lines represet
There are various different ways to graph information, but the part that tells you what the bars or lines represent is called a label. A label might appear next to a line, or a bar, or it might only appear on the x axis and the y axis.
the x-axies
It is the legend or key.
legend
The KEY or LEGEND tells the viewer what the lines represent. The labels along the axes usually tell the viewer what the units are, but the title of the graph can be used to tell the viewer the units as well or instead.
the x-axies