18,0 goes in x axis because there is only a
y value
0,12 goes in the y axis because there is only a y value
4.5, 10.6 goes in quadrant I because all the values in quadrant I must be positive.
3,-7 goes in quadrant IV because values in that quadrant will have a negative y value
-15, 12 goes in quadrant II because in that quadrant all the x values are negative.
- 3/4, -4 1/9 goes in quadrant III because in that quadrant both the x and y values are negative.
I recommend you draw a graph like this in your notes just in case you get another question like this, you could also print one out.
Also I apologize if anything is wrong.