Step-by-step explanation:
let's start at the origin (0, 0).
from there we increase x by 1. what is y ? 2.
so, we see, for every increase of x by 1, y increases by 2.
that makes the slope 2.
and therefore, the right equation is
y = 2x
remember, the slope is always the factor of x, when we have a pure "y =" on one side of the equation.
