Electric field of a continuous charge distribution at any point

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I am given a continuous charge problem in which there is a non-conducting wire of legnth L lying along the y-axis and I am required to calculate the electric field at any point along the x-axis.
I know how to compute the electric field of a continuous charge distribution at a given point, but I am not sure how to do so for any point.

Thanks

 

[mfb]

Here is your given point: (x₀,0)
Does that help? ;)
If you know the electric field for that point, you know it for every point along the x-axis, as you did not use any numerical value for x₀.