B.3.4—Rate from a linear graph

Calculate rate of change from a graph showing a linear relationship, including finding a zero-order rate constant from a concentration–time gradient.

Use b.3.4—rate from a linear graph to connect the rule to the data and decision in the question.

This matters because b.3.4—rate from a linear graph determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b.3.4—rate from a linear graph to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: B.3.4—Rate from a linear graph is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.