What is necessary to accurately find roots graphically?

To accurately find roots graphically, it is essential to have a precise graph with labeled axes and calculated points. A precise graph allows for a clear visualization of where the function intersects the x-axis, which indicates the roots of the function.

Having labeled axes helps clarify the scale and the values being represented, ensuring that the user can accurately interpret the graph. Calculated points enable the representation of essential features of the function, such as maxima, minima, and points of intersection. This precision is crucial in determining the accurate location of the roots, as a rough sketch may lead to misinterpretation, and random plotting of points without the function's context would not provide any useful information for finding roots. Therefore, option B encompasses all necessary components to ensure accurate identification of roots graphically.