RESEARCH METHODOLOGY

Detailed explanation-1: -Line graphs are used to track changes over short and long periods of time. When smaller changes exist, line graphs are better to use than bar graphs. Line graphs can also be used to compare changes over the same period of time for more than one group.

Detailed explanation-2: -If the independent and dependent variables are numeric, use line diagrams or scattergrams; if only the dependent variable is numeric, use bar graphs; for proportions, use bar graphs or pie charts.

Detailed explanation-3: -Pie charts are used to show parts of a whole. A pie chart represents numbers in percentages, and the total sum of all the divided segments equals 100 percent.

Detailed explanation-4: -With column charts, you could compare values for different categories or compare value changes over a period of time for a single category. Use column charts for comparison if the number of categories is quite small-up to five, but not more than seven categories.