What is a graph?

The correct answer is option 3- A pictorial representation of data with at least 2-dimensional relationships.

A graph is a pictorial representation of data, which has at least 2 dimensional relationship. Therefore, a graph has at least two axes, X and Y. X-axis is usually horizontal while Y-axis is vertical. A graph may either be a single line graph or a multiple line graph. For ease and enhancing of clarity, different types of lines and different shades of Colours can be used for preparing a multiple-line graph.