A reflection of a point (x, y) through the y-axis is given by the transformation:
[tex](x,y)\rightarrow(x^{\prime},y^{\prime})=(-x,y)\text{.}[/tex]
So the reflection of the point (x, y) = (-3, -7) gives the point:
[tex](x,y)=(-3,-7)\rightarrow(x^{\prime},y^{\prime})=(+3,-7)\text{.}[/tex]
So we must select the graph with the point (x', y') = (3, -7).
Answer
