Answer:
y=-2x+20
Step-by-step explanation:
Slope is -2 or 20/-10 because if you find two points on the graph, I used two that weren't in-between then u find that for every rise of 20 you go to the left 10. That means that the slope is 20/-10, simplify and get -2 as your slope. Right now you equation is y=-2x+b
Then to find the y intercept or b plug in any point from the graph. I used (40,100). Plug that into the equation that we already have and you get b equals 20.
So your equation is y =-2x+20
