Answer: -2
Step-by-step explanation:
To find the slope of a line, we use the formula
{x(2),y(2)} coordinates of second points in line
{x(1),y(1)} coordinates of first points in line
So to solve, you take any set of your coordinates given and you chose one to be your second set and your first set. Then you take the y from your 1st set, and you subtract it from the y from your 2nd set. Then you take that and you put it over from what you get when you take the x from the 1st set, and you subtract that from the x in your 2nd set.
So when I solve using this the coordinates given, I get -12-8/17-7
This equals to -20/10, and that equals to -2.
So you find the slope of the line as -2