find a slope, of the line containing (4,-7) and (-4,3)

Question

what is the slope and does it even exists

 

Answer 1

m = (y₂ - y₁)/(x₂ - x₁) = [3 - (-7)]/(-4 - 4) = ?

 

Answer 2

(y₂ - y₁)/(x₂ - x₁) = (3- -7)/(-4 -4) = 10/-8 = -5/4