Which table represents a function?

D

Step-by-step explanation:

For every input there can be only one output. D is the only answer that has one output per input.

i think that you should ask google for the answer to that problem because if we don't know it google does

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°