Converting between different scales I have a scale which goes from 0 to 100. Given a number on that scale (say 33) I want to find the corresponding value on another scale which goes from 25 to 100 (in this case I think the answer is 50).
Any ideas how I should go about working out the equation to calculate what the corresponding value is on the 2nd scale?


You want a linear equation relating the first scale (call it $x$) with the second scale (call it $y$). The line goes through the two points $(0,25)$ and $(100,100)$. Can you use that information to find the equation of the line?
