tolong yg baikk bantu pliss :) nomor 6,8,9 dan 10

6.
[tex]y - y1 = m(x - x1)[/tex]
y-4=2(x+3)
y-4 = 2x +6
y-2x-10=0

8. y - y1 / y2-y 1 = x-x1/x2-x1
tinggal masukin aja