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).
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