Which equation represents the line of reflection for this graph? a. y=-2b. x=-1c. x=0d. x=-1

The line of reflection is obviously a horizontal line. The only horizontal line in the answer list is ...
  A. y = -2

Often, it's not about knowing how to work the problem. It's about being able to eliminate bogus answers and recognizing the form the answer must have.


You can find points on the line of reflection by finding the midpoint between corresponding vertices. Those midpoints are (-4, -2), (-3, -2), and (-1, -2). The line through all three of those points is y = -2.