tentukan persamaan garis melalui titik B(7,-4) dan. M= -2 C(3,1) dan. M= -5

B(7,-4)
m= -2
y-y1=m(x-x1)
y-(-4)=-2(x-7)
y+4=-2x+14
y=-2x+14-4
y=-2x+10 atau
y= 2x-10

C(3,1)
m= -5
y-y1=m(x-x1)
y-1=-5(x-3)
y-1=-5x+15
y=-5x+15+1
y=-5x+16
y=5x-16