Answer:
A loss of 15 yards would be -15 yards.
The integer represents the yards gained or lost on the next play is 9. The required number line is shown in figure 1.
Step-by-step explanation:
Write your number on a piece of paper. You can write your integer in a variety of ways. For instance, write your integer in standard form (such as 63), expanded form (such as 100+50+2, which in standard form would be 152) or in written form (such as one thousand two hundred thirteen).
You have 0 in the center, then to the right of 0 you have positive numbers, and to the left of 0 you have negative numbers. In this case, think of sea level as 0. Anything above 0 (sea level) will be a positive number, and anything below sea level will be a negative number. So, 3 miles below sea level would be -3.