What is the equation for these tables?

Answer -2x+2 = y
Also y intercept is 1

Explanation:
The y value goes down by 2 every time the x goes up by one. That means that the equation must add 2. Now you have to think and see what times x plus 2 equals y. To make it easier you can subract 2 from one of the y’s. Lets use the first y as an example.
4-2= 2

No we know that -1 has to equal 2. -1 times -2 equals 2 so that must be it.

So -2x+2 is the equation. This part requires more thinking than actual math.