Answer:
The slope is negative and it is also proportional (A and C)
Explanation:
I used process of elimination.
If you look at the graph you will realize that x is positive and y is negative. Most times this will mean that the slope is negative, since positive and negative = a negative.
You can also tell that the y-intercept is not -3 because the line never intersects at -3 for the y line.
The relationship is proportional it goes through the origin and is also a straight line.
However, for the -6 slope, I can't really see the graph well, so I can't tell what the coordinate points are. If you can tell me, I can edit my answer and help.