Graphs & Charts

Question 1

what is a line graph used for?

Answer 1

• to display quantities plotted over a period
  of time
• to show figurers over a period of time

Question 2

when should you not use line graphs?

Answer 2

when there is a very large difference in quantity - use a table instead

Question 3

what is a bar graph used for?

Answer 3

• to show how values vary over a period of time
• to highlight individual figures rather than show an
  overall flow of figures
• to compare different items or figures

Question 4

when should you not use bar graphs?

Answer 4

• when too many bars are required, this would
  make the chart difficult to follow
• when the overall flow of figures is more
  important than individual values – use a line graph instead.