Answer:
first, make a dot on (0,-1)
Then, you draw a line that is -1/2
The way you draw a line explaination:
for every x, you go down and left by half a box.
for example, the next dot is (-1, -1.5)or (-1, -1/2)
and the next point after that is (-2, -1) and so on...
reminder: it goes on forever on both sides!