Slope problem im pretty sure it is -1/3 correct me if im wrong

The answer is -3.

Explanation:
The slope of a line is the ratio of how many units the line moves up or down the y axis to how many units the line moves across the x axis. In other words, it’s the rise/run of a line.

In the graph in the attached picture, every time the x axis increases by one, the y axis decreases by 3. Therefore, the ratio would be -3/1.

-3/1 is equal to -3, making the slope of this line -3.

I hope this helps! Please comment if you have any questions.