27. Solving a chemistry problem

2. Calculation of equivalent volumes of titrant for photometric and polarographic titration. Find the equivalence point on the following curve (mathematically and graphically).

V, ml 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Current, µA 29 46 58 70 85 87 86 88 85 85