Question 100233
(-4,8)  (r,-6) slope=2/3.
slope=m=change in y/change in x
m=2/3=(8-(-6))/(-4-r)
2/3=(8+6)/(-4-r)
2/3=14/-(r+4)
2/3=-14/(r+4)
Multiply 3(r+4) times both sides to get rid of fractions:2(r+4)=-14*3
2r+8=-42
2r=-42-8
2r=-50
r=-25
Ed