Answer:
[tex] \frac{y1 - y2}{x1 - x2} \\ \frac{ - 1 - ( - 3)}{ - 4 - ( - 3)} \\ \frac{ - 1 + 3}{ - 4 + 3} \\ \frac{2}{ - 1} \\ = (- 2)[/tex]
So the right answer is -2.
Look at the attached picture
Hope it will be helpful ..
