BC and AD are horizontal segments so their slopes are both 0
The slope of AB and CD can be determine using the slope formula :
For AB, the end points are (1, 1) and (4, 6).
For CD, the end points are (9, 6) and (5, 1).
Therefore, the slope of AB is 5/3 and the slope of CD is 5/4
The slopes of AB and CD are not equal