A minivan travels along a straight road. It initially starts moving toward the east. Below is the position-time graph of the minivan. Use the information in the graph to answer the questions.
15
10+
position (m)
5
11
ち|
is
50
16
60
10
13
30 40
time (5)
20
70
-5
At what time intervals is the minivan moving east?
to-t1 & t5-16
11-14 & t6-t7
O 11-14
Ot0 - 14.75