A line passes through (5, –4) and (–1, –4). Use the work below. m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction. M = StartFraction negative 4 minus (negative 4) Over negative 1 minus 5 EndFraction. M = StartFraction 0 Over negative 6 EndFraction. M = 0. What can you conclude about this line? Select all that apply. It is a vertical line. It is a horizontal line. The equation is x = –4. The equation is y = –4. It is impossible to have m = 0.