Answer
1) $(8.2,0)$ is a horizontal intercept
2) The correct approximation is $(8.1,0)$
Work Step by Step
The point $(8.2,0)$ is not the vertical intercept, but the horizontal intercept, therefore this is one of Maria's mistakes.
A second mistake is the approximation of the coordinates for the horizontal intercept: they are $(8.1,0)$, not $(8.2,0)$.
Since $x=8.1$ corresponds to the year $2000+8.1=2008.1$ and the corresponding $y$ coordinate is $0$, it means her conclusion is correct: there would be no cases of hepatitis A in about $2008$.
