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How to draw a graph

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Struggling to draw a graph? Having trouble plotting your data? These tips and tricks will help biology and chemistry students to get that data plotted.

If you find it tough to draw a graph then you may find the following course useful: http://mathsbiosciences.usefedora.com/courses/basic-chemistry

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How to draw a graph

  1. 1. How to draw a graph http://maths4biosciences.com
  2. 2. Key points to drawing a graph • Make the best use of the graph paper • Use a sharp pencil • Plot your point clearly and add the line • Join the points, or use a line of best fit • Clearly label the axes - don’t forget any units • Give the graph a title
  3. 3. 100 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9
  4. 4. 100 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9
  5. 5. 100 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 Don’t forget to give the graph a title x axis - label it (and don’t forget the units) yaxis-labelit(anddon’tforgettheunits)
  6. 6. Key points to drawing a graph • Make the best use of the graph paper • Use a sharp pencil • Plot your point clearly and add the line • Join the points, or use a line of best fit • Clearly label the axes - don’t forget any units • Give the graph a title
  7. 7. Worked example You have the data shown in the table How would you plot it on a graph? Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  8. 8. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  9. 9. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  10. 10. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  11. 11. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  12. 12. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  13. 13. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  14. 14. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  15. 15. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844
  16. 16. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844 Unknown Absorbance 
 (595 nm) Conc.
 (µg/ml) 1 0.500
  17. 17. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844 Unknown Absorbance 
 (595 nm) Conc.
 (µg/ml) 1 0.500
  18. 18. Concentration 
 (µg/ml) Absorbance 
 (595 nm) 0 0 1 0.054 2 0.130 4 0.225 8 0.410 16 0.844 Unknown Absorbance 
 (595 nm) Conc.
 (µg/ml) 1 0.500 9.23
  19. 19. Amount 
 (µgl) Absorbance 
 (595 nm) 0 0 3 0.066 6 0.130 12 0.255 24 0.481 48 0.966 Unknown Absorbance 
 (595 nm) Amount
 (µg) 1 0.187 2 0.406 3 0.703 4 1.189
  20. 20. Concentration 
 (µgl) Absorbance 
 (595 nm) 0 0 3 0.066 6 0.130 12 0.255 24 0.481 48 0.966 Unknown Absorbance 
 (595 nm) Amount
 (µg) 1 0.187 9.0 2 0.406 19.6 3 0.703 33.9 4 1.189 ???
  21. 21. Summary • Make the best use of the graph paper • Use a sharp pencil • Plot your point clearly and add the line • Join the points, or use a line of best fit • Clearly label the axes - don’t forget any units • Give the graph a title • Use different point styles if showing more than one data set
  22. 22. For more information and a free course please visit: http://maths4biosciences.com Maths course for biology and chemistry students: http://mathsbiosciences.usefedora.com If you have found this presentation useful then please share:

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