Okay, here we have this:
Considering the provided information, we are going to calculate the requested population, so we obtain the following:
Let us remember that we are talking about linear growth, therefore we will solve for the following formula:
![\begin{gathered} f(x)=b+mx \\ 68000=17000+m(2) \\ 51000=2m \\ m=(51000)/(2) \\ m=25500 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/rf3wzs6l1jqr3ucrkcx465wzkgaeq0i1yv.png)
Now, let's calculate the population after one year:
![\begin{gathered} f(x)=17000+25500x \\ f(1)=17000+25500(1) \\ f(1)=17000+25500 \\ f(1)=42500 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/5ru3myw8ryqwwcuwfa0h8by5zdj26jkpwm.png)
Finally we obtain that after one year the population will be 42500.