An equation for the line presented in the graph would be y=0x+4
What is the question now??
B :) open circle means inequality and it needs to be at least 3 so the line has to increase, meaning the arrow is going right.
Set up a proportion:

=

To solve cross multiply:
3000x=300000
divide both sides by 3000:
3000x/3000=300000/3000
x=100
It will take her 100 hours to drive 4000 miles assuming she continues to travel at this rate.
(1,-1)
(-4,2)
(-2,1)
I believe these will work