Please look at picture

As follows,

Step-by-step explanation:

1.ST=RN (Given)

2.ST=SI+IT (Given)

 .RN=RU+UN  (Given)

3. SI+IT=RU+UN  (Transitive property, From 1 & 2)

   SI+IT=IT+UN (Given, IT= RU)

4.SI+UN (Cancelling IT on both sides on 3)

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

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°