any line whose slope not equal to -4 does not satisfy these requirements.
step-by-step explanation:
going from (1,2) to (3, -6), x increases by 2 and y decreases by 8. thus, the slope of a line thru those two points has the slope m = -8/2, or m = -4.
thus, no line that has a slope different from m = -4 could be appropriate.