Answer:
9. 2/4 or 1/2
11. zero
10. y=1/2 x+3
12. negative
Explanation:
Look at the y-axis (up and down) and that will give you your starting point and then from there do rise over run
EX: #9. start at 3 on the y-axis, go up 1, over ( to the right) 2, and that gives you your x in y=mx+b
m=slope:1/2x
b=y-axis:3