ANSWER :
A 180 degrees rotation about the origin.
EXPLANATION.
Let us name the vertices of the triangle as follows.
[tex]A(1,1),B(4,1),C(3,2)[/tex]
If we reflect the triangle across the y-axis, then we have to negate the x-coordinates
to get,
[tex]A'(-1,1),B'(-4,1),C'(-3,2)[/tex]
If we now reflect triangle ∆A'B'C' in the x-axis, we will have to negate the y-values to obtain,
[tex]A''(-1,-1),B''(-4,-1),C''(-3,-2)[/tex]
The single transformation that will map ∆ABC to ∆A''B''C'' is
[tex](x,y)\rightarrow (-x,-y)
[/tex]
This is a rotation of 180 degrees about the origin.
