Answer:
The difference between the longest and shortest gliders is 6.
More gliders flew shorter than 35 feet because there is 12 dots behind 35 and only 8 in front of it.
To estimate you round the numbers to the nearest whole number
9.7 you round up to 10
3.3 you round down to 3
so 10x3= 30
A: parallel
B: perpendicular
C: neither
D: perpendicular
E: parallel
Explanation: Parallel lines have the same slope. Perpendicular lines have inverted and converted slopes. Neither has neither.