Answer:
4.7
Step-by-step explanation:
The red I think is hinting to the x.
y=-x+2
Take two points and solve for the slope using: (y2-y1)/(x2-x1)=m
Then take the slope and plug it into the slope-intercept equation, y=mx+b.
Finally, take a xy pair and plug it into your equation to solve for b.
