Two very large, parallel metal plates carry charge densities of the same magnitude but opposite signs (Fig).

Question:

Two very large, parallel metal plates carry charge densities of the same magnitude but opposite signs (Fig). Assume they are close enough together to be treated as ideal infinite plates. Taking the potential to be zero at the left surface of the negative plate, sketch a graph of the potential as a function of x. Include all regions from the left of the plates to the right of the plates.