Tell whether or not the relation is a function.
{(-4,-7), (-1, 8), (4, -7), (4, -8)}

Not a function because the domain 4 repeats.

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°