Question

which of the following is the formula for the population growth rate?
a r = (b + i) - (d + e)
b r = (i - b) + (d + e)
c r = (e + b) × (i + d)
d none of the above

Explanation:

The population growth rate formula is $r=(b + i)-(d + e)$ where $b$ is birth - rate, $i$ is immigration rate, $d$ is death - rate and $e$ is emigration rate.

Answer:

A. $r=(b + i)-(d + e)$