Physics - Geometrical Optics Question with Solution | TestHub

In an experiment to measure the focal length $\left(f\right)$ of a convex lens, the magnitude of object distance$\left(x\right)$ and the image distance$\left(y\right)$ are measured with reference to the focal point of the lens. The $y-x$ plot is shown in figure. The focal length of the lens is $\_\_\_\_\_\mathrm{cm}.$