K=- 1/2 b=-3/2 stands for a and b calculation.

Because AB//l 1

Let l 1 be y =-1/2x+m.

Replace m=7/2 with c.

L equation y=- 1/2x+7/2

2)

If the linear rotation formula is not used, let n point (m, n) be the symmetric point of AB and C.

There is AC=AN BC=BN

(m+3)^2+n^2=4^2+3^2

6^2+2^2=(3-m)^2+(n+3)^2

m=-3 n=-5

Let l2y = kx+b.

Replace B(3, -3), N(-3, -5)

k= 1 b=-4

y=x-4