persaman garis melalui titik P(3,-2) gradien -1 :::BANTU JAWAB 3 SOAL

23.
x-x1=m(y-y1)
x-3=-1(y+2)
x-3=-y-2
x+y-1=0 (D)

24.
a.m1=-2 ,m2=-3
b.m1=1 ,m2=1
c.m1=5 ,m2=-1/2
d.m1=3/2 ,m2=2

Jadi(B)

25.
y-y1/y2-y1 = x-x1/x2-x1
y-1/-3-1 = x+2/-4+2
y-1/-4=x+2/-2
-2(y-1)=-4(x+2)
-2y+2=-4x-8
-2y+4x+10=0

waduh g ad jwban ny :v..