42. Let f(x) = 1/x. Find a number c such that the average rate of change of the function f on the interval (1,c) is - 1/4

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit