Statement 1:
Given a graph $G=(V,E)$ in which each vertex $v \in V$ has an associated positive weight $w(v)$, we can use linear programming to find the lower bound on the weight of the minimum-weight vertex cover.
Statement 2:
The lower bound can be found by maximizing the following
$ \sum_{v \in V} w(v)x(v) $
subject to
$ x(u)+x(v) \ge 1 $ for each $(u,v) \in E$
$ x(v) \le 1 $ for each $v \in V$
$ x(v) \ge 0 $ for each $v \in V$
In the light of the above statements, choose the most appropriate answer from the options given below:
For minimum-weight vertex cover, we can write an integer linear programming formulation.
Its LP relaxation can be used to find a lower bound.
So, Statement 1 is correct.
But for minimum-weight vertex cover, the objective should be minimized, not maximized.
Correct objective should be:
$ \text{Minimize } \sum_{v \in V} w(v)x(v) $
Statement 2 says maximizing the objective, so Statement 2 is incorrect.
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and More.