Reflect across the y-axis.
H(1,-3)→H
Z(1,2)→ Z
W(4,1)→ w

Reflection across the y-axis is H(-1,-3), Z(-1,2) W(-4,1).When point M (h,k) is reflected along the y-axis, the image M' with coordinates of forms in the second quadrant (-h, k).Thus, we get the conclusion that when a point is mirrored along the y-axis, the y-coordinate stays constant but the x-coordinate changes to the negative.H(1,-3) → H(-1,-3)Z(1,2) → Z(-1,2)W(4,1) → W(-4,1)To learn more about reflection here:https://brainly.com/question/15487308#SPJ1