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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: