What conclusion can be drawn to determine the slope of line xz

To determine the slope of a line, you pick two points then subtract the second y coordinate from the first y coordinate, and subtract the second x coordinate from the first... there you have it, the slope

m = (y2-y1)/(x2-x1)

Hope this helps :)

I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.