ANSWER
Third option
Step-by-step explanation
We want to identify the graph that correctly describes the points.
The first quadrant on a coordinate grid is the quadrant located in the top right corner of the coordinate grid.
Also, we have that point B is located at (-1/2, 1) and C is a reflection of point B across the y-axis.
When a point is reflected across the y-axis, it changes as follows:
![(x,y)\to(-x,y)](https://img.qammunity.org/2023/formulas/mathematics/college/rm9of062rm29b8zsd64ko69lqolf3iiq66.png)
This implies that point C is located at:
![((1)/(2),1)](https://img.qammunity.org/2023/formulas/mathematics/college/ddab5ivy3nqxr4aad12uexsrhyg0szdn66.png)
Therefore, the graph that correctly describes the points is the third option.