Axes, title, Key (if needed, also called a legend), Axis labels
The x-axis is the horizontal axis on a graph. The y-axis is the vertical axis on a graph.
The y axis and the x axis (that is the vertical axis and the horizontal axis) I presume.
A linear graph contains both an x and y axis.
The convention for an x-y graph is as follows: y | | |_____ x where the x-axis is horizontal and the y-axis is vertical.
axis labels are x and y while bar graph labels explain what the graph is representing.
ledgends
The answer depends on what the graph is meant to show. The first step would be to read the axis labels.
The axis labels.
Well, a letter below a graph usually labels that axis, which is usually the x-axis. In a distance vs. time graph, the letter on the y-axis is usually D for distance, and the letter on the x-axis is usually T for time. That's about the best I can tell you without seeing the graph
use descriptive axis labels and legends. <><><><><><><><><><><><><><>
Axes, title, Key (if needed, also called a legend), Axis labels
I suggest you go to your math book and look at an example of graphs. Basically, it is a box with labels on the bottom (horizontal axis) of the box representing the items you are graphing and along the vertical axis you will have data. You will put in bars of different colors to represent the data corresponding with the labels. A double bar graph would be two of these.
If the labels on the x-axis and y-axis are real numbers, then every possible point anywhere on the graph corresponds to a pair of real numbers.
All graphs need labels or data on both of the axis to be of use. So all graphs require a "key"
The y axis is going up on the graph and the x axis is going sideways on the graph
A pie graph does not have an axis.