The electric potential \(V\) as a function of position \(x\) along the \(x\)-axis in an isolated region is shown in the graph. The profile consists of a parabolic curve with its vertex at \((1\text{ m}, 4\text{ V})\) extending from \(x = 0\) to \(x = 2\text{ m}\), a linear segment from \(x = 2\text{ m}\) to \(x = 4\text{ m}\), and a horizontal line from \(x = 4\text{ m}\) to \(x = 6\text{ m}\). Which of the following statements correctly describes the electric field component \(E_x\) in this region?