Electric Field Sketch: Ex vs. x & Fx vs. x Homework

[cerium]

Homework Statement

Sketch 2 diagrams 1 showing Ex against x and 1 showing Fx against x

Homework Equations

The Attempt at a Solution

I have drawn a graph showing potential difference against x and have been asked to produce a sketch showing Ex and Fx relating to this graph but I am unsure how to do this, will my sketch of Ex be going from positive to negative if my pd went from neagative to positive
Thanks in advance cerium

 

[gabbagabbahey]

What is the equation that determines the electric field from its potential? What does that equation reduce to when the potential depends only on $x$?

 

[cerium]

Equation relating electric field and potential is Ex= -dV(r)
dx
if it just relies on x then is it just an inverse sketch of the pd graph