P3.7—Interpreting data and drawing conclusions

Interpret a table or graph by stating the pattern, quantifying it with a mean, rate, concentration, percentage or gradient, and linking the result to the chemical model.

Use the correct variables and units, interpolate only within the evidence and distinguish a measured trend from an explanation. A gradient or intercept should be tied to what it represents.

If gas volume rises linearly with time, the gradient is the rate of gas production; if two concentrations give a larger gradient for the more concentrated sample, explain it using collision frequency.

A correlation is not automatically a mechanism, and a numerical average does not remove systematic error.