Question in the picture

Ok s the line is at the y intercept at (0,-50)
And if u choose two points on the graph (solid points) lik…. (0,-50) and (20,-30)
Use rise/ run
S u go up two units and right two units s 2/2
And so.
Y=mx+b
Plug in a few numbers….
Y=1x-50
nd the slope is moooving up (how do I know??) because from the start which is (0,-50) it goes up. So that’s why the 1 is positive. It’d be negative if it’s going the other way.
Sorry if that made no sense but moral of the story, the answer is y=1x-50

50/-100 that would be the answer I’m not sure