An unseen question

[methodsboy]

hey
i have never seen a graph like this and im not sure how to do question 248 (highlighted):


[IMG]http://img196.imageshack.us/img196/8186/questioncvx.jpg[/img]



It's from a VCAA exam, so i trust that the Vs isn't a typo and that it's meant to be Vs not Ek. Could someone please give some guideance as to how to approach a graph such as this. Thanks 

[Flaming_Arrow]

its just the y intercept, 2eV or 2 * 1.6 * 10^(-19) J

[methodsboy]

its just the y intercept, 2eV or 2 * 1.6 * 10^(-19) J

But should the y-intercept be labelled as Ek not Vs?

[Flaming_Arrow]

its just the y intercept, 2eV or 2 * 1.6 * 10^(-19) J

But should the y-intercept be labelled as Ek not Vs?

doesn't matter which one, you can just convert it

[methodsboy]

its just the y intercept, 2eV or 2 * 1.6 * 10^(-19) J

But should the y-intercept be labelled as Ek not Vs?

doesn't matter which one, you can just convert it

okay thanks