In xy plane, does the line y = 3x + 2 contain point (r, s)? C
a. (3r + 2 –s)(4r + 9 – s) = 0
b. (4r – 6 – s)(3r + 2 – s) = 0
a. (3r + 2 –s)(4r + 9 – s) = 0
b. (4r – 6 – s)(3r + 2 – s) = 0
3r + 2 - s MUST equal 0 because it is in both equations.
The reason for this is that the other two equations are both different, hence both of them can not equal 0.
3r + 2 = s
same as
3x + 2 = y
IMO C
