model:

P$($t$)=$ P$($t$)10$ P$($t$)$ R$($t$)$ R$($t$)=0\mathrm{.}5$ R$($t$)$

where

t is measured in decades from the year $2024.$

P$($t$)$ is the population in millions at decade t$.$

R$($t$)$ is the average price of a rental unit at decade t in units of thousands of dollars $($per month$).$