- A line graph is a one dimensional diagram. in this graph two elements are shown. Usually time is shown on the X or horizontal axis and population or commodity value is shown on the Y or vertical axis.
- Method: -Read the data to find out the highest and lowest value. Accordingly select the scale on both the axis. Mark time period on X-axis and the other element on Y-axis. Plot the points in the graph space with reference to the values on X and Y variables by intersecting the two values. Join all the points with a smooth curve. Write the scale, title and legends etc.
- Uses: - Line graph is very useful to express the trend in values over a period of time. Population growth, Industrial growth, Profit, Prices, etc. can be visualized very easily.