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

Check all that apply.

A. x = -1.7
B. x = -1.1
C. x = 1
D. x = 2.4
E. x = 4.3
F. x = 6

Question

The points plotted below are on the graph of a polynomial. Which of the following x-values best approximate roots of the polynomial?

Check all that apply.



 		A.	x = -1.7
 		B.	x = -1.1
 		C.	x = 1
 		D.	x = 2.4
 		E.	x = 4.3
 		F.	x = 6

anonymous · Answer

I really don't know how to do this. I know that if it is close to the line, since the Y=0 then it is one of the answers but... I can't figure it out.... Help Me?

anonymous · Answer

you are supposed to visualize where a smooth curve through those points crosses the x axis

anonymous · Answer

the one on the left looks close to $-1$
the middle one is about $2$ 
and the last one is around $6$ by my estimation

anonymous · Answer

^ignore that. So is there a way to know what it is everytime?