Answer:
y = -1/2x+4 (or just -1/2)
Step-by-step explanation:
Slope is y=mx+b where m is the slope and b is the y intercept. To find slope just simply count units from points of intersection using rise over run. So if you move up (Rise) one unit then left (Run) two, you get a slope of -1/2.
Let me know if you need further explanation.
