Answer: a A graph models data.
Step-by-step explanation:
Graphs are the scaler representations of the variables mentioned in the data table obtained after the experimentation or observations. They are made to observe all the data in the table in a precise form or diagrammatic way. The bar graphs, and line graphs are the examples of the types of graphs. They are made to deduce the relationships between two or more variables. They are used to represent the data which is too much complicated and vast.