Question

(a) The population of a certain city decreased by 16,000 people.Write a signed number to represent this population change.(b) A growing animal gained 2 pounds.Write a signed number to represent this weight change.

Answer 1

(a)

Since the population is decreasing by 16000, we can express this change as:

$-16000$

(b) Since the animal is gaining 2 lb, we can express the change as:

$+2$