Answer:
Graph C
Step-by-step explanation:
The quadrants of a Cartesian plane are the four regions formed by the intersection of the x-axis and y-axis. Quadrant I is the top right region, where the x and y coordinates of points are positive.
Given that point A is located in Quadrant I, we can immediately discount the first and last graphs, since point A is located in Quadrant II in these graphs.
When a point is reflected across the y-axis, its x-coordinate changes sign while its y-coordinate remains unchanged. In other words, this reflection results in a horizontal flip, with the y-axis serving as the axis of symmetry.
As point B is located in Quadrant II in the second and third graphs, reflecting it across the y-axis would result in its position shifting to Quadrant I. In the second graph, it is reflected across the x-axis, relocating it to Quadrant III.
Therefore, the graph that shows point A in Quadrant I, point B located at (-1/2, 2) and point C as a reflection of point B in the y-axis is:
[tex]\Large\boxed{\boxed{\sf Graph \;C}}[/tex]