Just teach me how to do this for any scenario.

Step-by-step explanation:

To use Scenario Analysis, follow these five steps:

Define the Issue. First, decide what you want to achieve, or define the decision that you need to make. ...

Gather Data. Next, identify the key factors, trends and uncertainties that may affect the plan. ...

Separate Certainties From Uncertainties. ...

Develop Scenarios.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)