The Answer is D
The first line has the slope of +1
[tex]m\text{ =(y2-y1)/(x2-x1) = (5-3)/(1+1)= 1}[/tex]It has the y-intercept of 4 from the graph
[tex]y\text{ = x+4}[/tex]The second line has the slope of -2
[tex]m\text{ = (4+2)/(-4+1) = 6/-3 = -2}[/tex]It has the y-intercept of -4
[tex]y\text{ = -2x-4}[/tex]