Question

Can someone please help me

Answer 1

-4

Explanation:

Take any 4 points,

(-7,21) & (-4,9) as (x₁, y₁)/(x₂, y₂)

Slope(m) = (y₂-y₁)/(x₂-x₁)

(9-21)/(-4-(-7))

-12/(-4+7)

-12/3

-4