Checking a reading in a power relationship

Checking a reading in a power relationship

Secondary 3
9 marks
TGM Original Questions

Positive variables \(x\) and \(y\) satisfy \(y=ax^n\). One value of \(y\) in the table is incorrect.

\(x\)124816
\(y\)31260192768
  1. On separate graph paper, draw a suitable straight-line graph using logarithms.[4]
  2. Identify the incorrect reading and estimate its correct value.[2]
  3. Find \(a\) and \(n\).[3]

Solution:

Solution locked

Sign in to view the step-by-step solution

Similar questions are unavailable for this question.
Answer:(b) At \(x=4\), replace \(60\) with approximately \(48\). (c) \(a=3,\ n=2\).

Need help? Join our JC Math tuition classes.

Learn more