Well one is positive and one is negative
Answer:
1000
Step-by-step explanation:
The population of the suburb after each decade d is given by the equation as follows :

We need to evaluate the expression for d = -2.
Put d = -2 in the above equation. So,

So, if d = -2, then the population of the suburb is equal to 1000.
For two line segments to be parallel, their slopes must be equal.
Therefore slope of AB must be equal to slope of CD
which is, option 3
(y4-y3)/(x4-x3)=(y2-y1)/(x2-x1)