Slope = [change in y coordinate]/[change in x coordinate]
= [3 - 0]/[7 - (-8)] = 3/15 = 1/5
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Points: (8, 3) and (8, 7) Slope: 0 The line is a straight vertical line parallel to the y axis
If you mean points of: (0, 1) and (4, 4) Then the slope is: 3/4
Parallel lines have the same slope. -3x - 7y = -8; the slope = -(-3/-7) = -3/7. Thus any line with slope of -3/7 is parallel to -3x - 7y = -8. Exampes: -6x - 14y = 0 -3x - 7x = 2 etc.
Points: (-3, -1) and (-7, -8) Slope: (-1--8)/(-3--7) = 7/4 or 1.75
If you mean points of: (0, 7) and (8, -3) then it works out as -5/4