how do you find the ordered pairs for a graph for example y=2x

You plug in one value as 'x' to find 'y'. or vice versa.

ex. y=2x

I will use 1 for x

2*1=2 so, y=2

When you plot this on a graph you plot it as (1,2). 1 being on the x-axis, and 2 on the y-axis