Graphs visually represent data for quick understanding. Types: histogram (continuous data), bar chart (categorical), pie chart (proportions), line graph (trends). Key concepts: appropriate graph for data type, clear axes labels, meaningful title. Histogram: adjacent bars show frequency distribution. Bar chart: separated bars compare categories. Pie chart: sectors show composition (parts of whole). Line graph: shows trends over time. Common traps: misleading axes (truncated scales), poor choice of graph type, unclear legends. Exam tips: match graph type to data characteristics, read axes carefully. Time-saving: recognize standard graph patterns visually. Applications: business dashboards, trend analysis, comparisons. Graphical interpretation: area, height, position convey information. Color coding enhances clarity but avoid excessive decoration. Practice translating between tables and graphs. Visualization skills essential for data communication.