Answer:
-0.5
Explanation:
Slope (gradient) = (y₂ - y₁) / (x₂ - x₁)
When given 2 sets of coordinates i.e. (-3, 8) and (5, 4), one set (which can be any btw) would be the 1's and the other would be the 2's.
(If you didn't know before now; the x's come first and the y's come second in each set.)
So in this case the x's are -3 and 5 and the y's are 8 and 4.
The 1's can either be -3 and 8 or 5 and 4. Same for the 2's
I'll pick the first set as 1's and the second set as my 2's
Therefore, y₂ = 4; y₁ = 8; x₂ = 5; x₁ = -3
Slope = (4-8) / (5-(-3)); -4 / 8 = -0.5