The points plotted below are on the graph of a polynomial. Which of the following x-values best approximate roots of the polynomial?

The roots of a polynomial are the x-axis intercepts where y=0.

The polynomial is a cubic as the graph has the characteristic shape and crosses the x-axis 3 times.

Since the scale is linear, each dash represents an increase of 1.

If you connect the dots you should get the curve crossing at x= -1.1
x= 2.4
x= 6.0