A: 1/2
A: -1/2
A: -2
A: 2
B: Y-2=1/2 (X-1)
B: Y-1= -1/2 (X-3)
B: Y-1= 1/2 (X-3)
B: Y+1= 1/2 (X+3)
B: Y-2= 1/2 (X-1)
B: Y+1= -1/2 (X+3)
B: Y+2= -1/2 (X+1)

A 12 A 12 A 2 A 2 B Y212 X1 B Y1 12 X3 B Y1 12 X3 B Y1 12 X3 B Y2 12 X1 B Y1 12 X3 B Y2 12 X1 class=