Q.State any two advantages of using diagrams and graphs to present economic data, instead of presenting the same data only as a table of numbers.

Diagrams and graphs let a reader grasp a relationship at a glance, and make it far easier to compare several data series or spot a trend than scanning a table of raw numbers would. …

Advantage 1 — Instant comprehension. A diagram or graph condenses a large amount of numerical detail into one visual impression — a reader can tell within seconds whether a quantity is rising, falling, or staying flat, and roughly by how much, without reading and mentally comparing dozens of individual figures from a table.

Advantage 2 — Easier comparison and trend detection. When several categories or several years' worth of data are shown together (a multiple bar diagram, or several lines on one graph), differences and trends that would be easy to miss buried in a table of numbers become visually obvious — which sector is largest, which year saw the sharpest change, or where two curves (such as demand and supply) intersect. …

Giving only one advantage when the question asks for two, or describing a disadvantage (e.g. 'a wrong scale can mislead') instead of an advantage — that po …