The uploaded image is related to a problem about identifying inflection points from a graph, not estimating $f'(8)$. Since the task is to estimate $f'(8)$, it seems there's some confusion because the content of the image doesn't provide information on $f(8)$ or nearby points to estimate $f'(8)$.

How to Proceed:

1. If you're referring to $f'(8)$ and want to estimate it:

   • I need specific data points around $x = 8$ or a function definition to proceed with the estimation using numerical methods.

2. If you want to identify inflection points from the graph in the image:

   • Inflection points are where the concavity of the function changes, which corresponds to changes in the sign of the second derivative. These typically occur where the slope of the tangent line changes direction from increasing to decreasing or vice versa.

Please confirm which task you'd like to continue with or provide additional details to proceed effectively!