For this graph:

ImageShack - Hosting :: graphny5.png

I need to match some terms with the letters on that graph, this is what I have:

delta y = F

Tangent Line = E

Error of linear approximation = C

f'(x)dx = A

Increment of x = D

dy-delta y = B

but it's not correct, can anyone tell me what is wrong? I was almost positive that is correct

Thanks!