SImple,
this line is in the form of y=mx+b..which means that m=slope and b=y-intercept..
Thus, the slope for this line is....

Thus, your answer, A.
Answer:
Population after 16 year = 927 people (Approx.)
Step-by-step explanation:
Given:
Decrease rate = 10% per year
Current population = 5,000
Find:
Population after 16 year
Computation:
A = P[1-r]ⁿ
A = 5,000[1-0.1]¹⁶
A = 5,000[0.9]¹⁶
A = 5,000[0.1853]
A = 926.51
Population after 16 year = 927 people (Approx.)
7 1//2 divided by 1 1/2
7 1/2 = 15/2
1 1/2 = 3/2
15/2 divided by 3/2 equals 5