Final answer:
The reflection of the point T at (3,5) across the y-axis will be in Quadrant 2.
Step-by-step explanation:
When a point is reflected across the y-axis, the x-coordinate of the point changes sign, while the y-coordinate remains the same. In this case, the point T at (3,5) would become (-3,5) after reflecting across the y-axis.
Since the x-coordinate (-3) is negative, the reflected point will be in Quadrant 2.