Chapter 1 - 1.2 - Linear Equations in One Variable - 1.2 Exercises - Page 88: 70b

$291.7$. This means that in $2000$ the population was $291.7\cdot1000=291700$.

The y-intercept is at $x=0$ on the graph. Hence here if we plug in $t=0$, then $y=-2.6\cdot0+291.7=291.7$. Thus the y-intercept here is $291.7$. This means that in $2000$ the population was $291.7\cdot1000=291700$.