1. The problem statement, all variables and given/known data A region of space has a non-uniform electric field that points in the +x-direction and has magnitude as shown in the figure (Figure 1) As a reference point, take the potential at the origin to be -140 V . Calculate the electric potential at x=3.0m. Express your answer to two significant figures and include the appropriate units. 2. Relevant equations -∫E⋅dr Ex = -dV/dx 3. The attempt at a solution So I attempted to take the integral from 0 to 3 of the graph seen, but I did not know what E and dr were. I searched the web and found the closes thing being the potential difference given at x = 0. This is where I got lost and could not figure out what I needed to put in for dr and E fully. I know I have to integrate somehow, but with what? I just know the boundaries are 0 to 3, but everything else is confusion. P.S. Also is there any really good physics 2 textbooks that explain these concepts very well? I know of the Feynman lectures, but any old school physics books that could be recommended for elctrostatics and such. Thanks to any suggestions!