I was first given the limit:

I was then asked to find delta x and delta y in terms of each other (delta x = x-2 and delta y = y-(1/3)), which I found to be:

and was then asked how accurate y~L if x~2+/- 10^-3. How do I do this?

Sorry if my tags are messy, I'm not used to using them. Appreciate any help!