The second graph A'B'C' is the result of a reflection over x axis of the figure ABC; You can see that because the coordinates of the points follow the next rule:
[tex]P(x,y)\rightarrow P^{\prime}(x,-y)[/tex]
Point A: (-2,1) becomes A'(-2,-1)
Point B: (1,4) becomes B'(1,-4)
Point C: (3,2) becomes C'(3,-2)
