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  • A pictorial representation of data is a graph.
  • A bar graph is used to compare among categories.
  • A pie graph is used to compare parts of a whole.
  • A histogram is a bar graph that shows data in intervals.
  • A line graph displays data that changes continuously over periods of time.
  • A graph obtained by joining the plotted points in a line.
  • We need x-coordinate, y-coordinate for fixing a point on the graph.
  • We can show direct variation through line graph.

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