Answer:
![-1](https://img.qammunity.org/2022/formulas/mathematics/high-school/m3mb0y9d03h7v0z4z4ufhih4w4s0x3t5zr.png)
Explanation:
This is a really nice line that goes through a lot of grid points (where the lines intersect).
One easy way to find the slope is the phrase "rise over run." "Rise" is the name for vertical motion from point-to-point. "Run" is the name for horizontal motion from point-to-point.
Pick two easy points on the line, say (0, 0) and (1, -1).
If you go from (0, 0) to (1, -1), the rise is -1 -- because you went DOWN 1 unit.
The run is 1 -- because you went RIGHT 1 unit.
![\frac{\text{rise}}{\text{run}} =(-1)/(1) =-1](https://img.qammunity.org/2022/formulas/mathematics/high-school/spjosx4mvmjwsadx6s14bg2trya3866dwa.png)
The slope is -1.
Cool fact: You'll get the same value if you use any two points on the line.