The points (5,3) and (1,-1) are plotted on a sheet of graph paper. The sheet of graph paper is folded along a line so that the point (5,3) lands on top of the point (1,-1). The equation of the line that represents the fold is
Answer Choices
A. y=-x+1
B. y=-x+2
C. y=-x+3
D. y=-x+4
E. y=-x+5