Answer
Two points that lie on a line with a slope of -9 would be (1,-9) and (2,-18).
These points are found by understanding that the slope of a line dictates how steep the line is. This slope goes down 9 (because it is negative) and to the right one. This means that if the line is starting from (0,0) it would travel first to (1,-9) and then to (2,-18).
Work Step by Step
Explanation above.