Write the coordinates of the vertices after a reflection across the line y = 2. P(-1, -4)=? Q(4, -4)=? R(8, -1)=? S(3, -1)=?

Question

Need graph paper

Answer 1

The line y=2 is horizontal.  

 

When a point not on a horizontal line is reflected across that line, the x-coordinate is unchanged.  The y-coordinate of the given point, 4, is six less than 2, so the y-coordinate of the reflected point is six more than 2.

 

So, P = (-1,-4) is reflected to (-1, 8).

 

Reflect the other points in the same way.