Practice Graph – common mistakes

Click the image below to enlarge the “Instrument Response Vs. Concentration” graph.

There were some common mistakes made on the practice graphs.

1. Include a cover page that clearly indicates your name and the peer reviewer’s name. Both should SIGN the cover page.
2. Not everyone’s graph had their graph reviewed by a classmate. I need to see the peer reviewer’s comments. You may do more than one peer review.
3. Peer reviewer’s name not available. (This is worth 2 marks for the peer reviewer.)
4. Need to hand in THREE Excel-generated graphs:
   Graph 1 is your original graph.
   Graph 2 with the peer reviewer’s comments.
   Graph 3 with the peer reviewer’s with the fixes.
   Clearly mark which graph is which.
5. Include the trendline line equation and the R² value.
6. Need minor ticks and draw grid mark for both axes.
7. Draw in the lines to intersect the y-axis and the x-axis to indicate the unknown sample’s mV reading and concentration. These lines MUST be perpendicular to the axes. These lines must reflect the unknown coordinate (56.5, 0.78)
8. Write the concentration of the unknown sample on the graph; include units.
9. Write the slope of the trendline line on the graph; include units.