In the given figure of trapezium : Height is the distance between the line PQ and SR
The base line SR is start with the y = -1
and the Top line PQ is start with the y = 6
The distance between 6 and ( -1) is : 6 - ( -1)
Distance between 6 and ( -1) is : 6 + 1
Distance between 6 and ( - 1) is 7
So, The distance between line PQ and SR is 7
Answer : 7 units