P3.3.3 - Use logarithmic graphs to estimate

Use logarithmic graphs to estimate Plot log y against log x and obtain a straight line where the parameters in relationships of the intercept is log a and the gradient is n. form y = axn Plot log y against x and obtain a straight line where the and y = kbx. intercept is log k and the gradient is log b.

Use use logarithmic graphs to estimate to connect the rule to the data and decision in the question.

This matters because use logarithmic graphs to estimate determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply use logarithmic graphs to estimate to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Use logarithmic graphs to estimate is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.