Step-by-step explanation:
The slope of BC can be calculated
Slope = rise/run
In this case, the rise is the height of the blue triangle and the run is the base of the blue triangle, so
Slope = 2/6 = -2/6
To simplify the slope, we need to divide by 2, so
![\text{Slope}=-(2/2)/(6/2)=-(1)/(3)](https://img.qammunity.org/2023/formulas/mathematics/college/ph2yvnuq0elikf2x4hnn5mtcpezc6aqdnb.png)