Answer:
slope= ∞ or slope= -∞
Explanation:
The steepest slope is that of the line that is closest to being vertical. This could be a line that has positive slope OR negative slope
the steepest one should be determined by examining the ABSOLUTE VALUES of slope
As a line is vertical when it has slope +∞ or -∞, Therefore line with slope equal either of the 2 values has the steepest slope