Answer:
A. -3
Step-by-step explanation:
Look at the first picture.
The formula of a slope:
[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]
We have the points (1, 4) and (2, 1). Substitute:
[tex]m=\dfrac{1-4}{2-1}=\dfrac{-3}{1}=-3[/tex]
Look at the second picture.
The slope m:
[tex]m=\dfrac{rise}{run}[/tex]
[tex]rise=-3\\run=1[/tex]
Substitute:
[tex]m=\dfrac{-3}{1}=-3[/tex]
