i am having difficulty finding the answer to this question

Explanation:
Slope:
Slope of the line describe the direction and steepness of line.
it is basically the ratio o the vertical change to the horizontal change.
For the two points on the line the slope is calculated as,
[tex]\begin{gathered} (x_1,y_1)and(x_2,y_2) \\ m=\frac{y_2-y_1}{x_2-x_1} \end{gathered}[/tex]Answer: option b) is the correct formula to find the slope of the given line EF.