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Homework Statement
I attached a graph below.
A graph of the x component of the electric field as a function of x in a region of space is shown in Fig. 2430. The scale of the vertical axis is set by Exs = 20.0 N/C. The y and z components of the electric field are zero in this region. If the electric potential at the origin is 19 V, (a) what is the electric potential (in V) at x = 2.0 m, (b) what is the greatest positive value of the electric potential (in V) for points on the x axis for which 0 <= x <= 6.0 m, and (c) for what value of x is the electric potential zero?
Homework Equations
eqn1.Calculating the potential from the field:
vf=Potential final
vi=Potential initial
E = electric field
ds = an alloted distance
vfvi = (integral from initial to final) E dot ds
eqn2.Calculating the field from the potential:
E(sub)s = delta V / delta S
The Attempt at a Solution
For part A I first used eqn 2 to get 20N/c =  [ (vf19) / 2] which leads to 21 Vf, but that answer was incorrect when i submitted it.
For part C i thought at x=3, it was incorrect, then x=2 and x=4 were incorrect.
I dunno what to do for that one.
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