The relationship between the power, WWW, and the current, III, in an electrical component is modeled by W=rIkW = rI^kW=rIk, where r r\,r and k k\,k are constants.
Show that this relationship can be written in the form logW=logr+klogI\log W = \log r + k \log IlogW=logr+klogI.
42 exam-style questions on CCEA A Level Maths 2.5.4 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.