Final answer:
Line graphs are best for data change over time, pie graphs represent parts of a whole, and bar graphs compare categories or groups.
Step-by-step explanation:
There are three types of graphs commonly used: line graphs, pie graphs, and bar graphs. Each type of graph is suitable for representing different data and measures of central tendency.
Line graphs are best used to show the change in data over time. They plot points on a grid and connect them with lines, allowing viewers to see trends and patterns.
Pie graphs are used to represent parts of a whole. They are ideal for showing percentages or proportions.
Bar graphs are effective for comparing categories or groups. They use vertical or horizontal bars to represent different values or quantities.