Final answer:
Justin's football team is now on the 12-yard line after gaining 17 yards and then losing 6 yards on the following play.
Step-by-step explanation:
The student's question pertains to movement on a football field measured in yards. Initially, Justin's team starts on the 1-yard line. They gained 17 yards on the first play, moving them to the 18-yard line. However, on the next play, they lost 6 yards. To determine their current position on the field, we subtract the lost yards from where they ended up after gaining yards. So, 18 yards minus 6 yards equals 12 yards.
Therefore, after the two plays, Justin's football team is now on the 12-yard line.