Edexcel IAL Biology 3P.14 Unit 3 processing results

Use a large graph triangle or correct tangent, retain signs and units, present raw and mean data systematically and connect the processed result to the conclusion.

Exam points

Calculate graph gradients or rates with suitable triangles, signs, precision and units.
Record raw data, means and uncertainty in correctly headed tables and graphs.
Select a statistical or quantitative relationship that addresses the investigation.

[Maximum number: 3]

In an investigation, the water potential of a potato was compared with that of a yam.

The graph shows the results obtained in this investigation.

Figure for Question 3P.14—Unit 3 processing results question 1 — Edexcel A-Level Biology AS

The equation for a straight line is y=mx+c.

Calculate m for the line of best fit for the potato data and write down the equation for this line.

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3P.14—Unit 3 processing results question 1