# Graph matching

1. Nov 26, 2009

### Slimsta

1. The problem statement, all variables and given/known data
http://img121.imageshack.us/img121/8907/graphr.jpg [Broken]

2. Relevant equations

3. The attempt at a solution
i cant believe i got this wrong.. i even checked the textbook for that and still got it wrong :/
B,C,D,E are 100% correct.
the other 2 i logically matched them..
increment of x obviously gonna be F
and the tangent line, or the differentiable of y is A
so whats wrong?

Last edited by a moderator: May 4, 2017
2. Nov 26, 2009

### Staff: Mentor

dy and Differential of y are the same thing.

A is the line, whose equation would be y - y0 = f'(x0)(x - x0), where (x0, y0) is the point where the line is tangent to the curve, and f'(x0) is the slope of the tangent line. Other notation for f'(x0) is $$\frac{dy}{dx}|_{x = x_0}$$.

3. Nov 26, 2009

### Slimsta

oh i didnt know i can use the same answer twice.. i was thinking that too but then i thought it would be wrong with 2 of the same answers..

thanks man

4. Nov 26, 2009

### Staff: Mentor

I think they got tricky on you.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook