Answer:
The integer represents the yards gained or lost on the next play is 9.
The required number line is shown in figure 1.
Explanation:
Consider the provided information.
A football team lost 9 yards during a play.
Represent Lost with a negative sign.
Thus, lost of 9 yards can be written as: -9 (As shown in the provided figure)
Now it is given that the team had a combined gain or loss of 0 yards after the next play.
Let they gain or lost x score in next play.
-9 + x = 0
Add both the sides by 9
x = 9
It means team must gain 9 yards.
So, the integer represents the yards gained or lost on the next play is 9.
Now represent this on number line.
Move 9 digit right to -9.
The required number line is shown in figure 1: