How can the graph of f be used to determine the zero of f A

How can the graph of f be used to determine the zero of f?

A.

Determine the zero of f by finding the y-coordinate of the point where the line intersects the y-axis.

B.

Determine the zero of f by finding the y-coordinate of the point where the line intersects the x-axis.

C.

Determine the zero of f by finding the x-coordinate of the point where the line intersects the y-axis.

D.

Determine the zero of f by finding the x-coordinate of the point where the line intersects the x-axis.

Solution

From factor theorem, for a function f(x) if c is a zero of f(x) then f(c)=0 which implies y=0 and on the x-axis, y=0.

Therefore, the zero of the function f(x) can be found out by finding the x-coordinate of the point where the line intersects the x-axis.

Hence, the answer is Option D