slope of (15,-6) and (-2,-1)
The slope of a line is calculated using the formula:
slope = (change in y-coordinates) / (change in x-coordinates)
In this case, the change in y-coordinates is -1 - (-6) = 5, and the change in x-coordinates is -2 - 15 = -17.
Hence, the slope is 5 / -17 = -5/17.