Give the geometric representations of y=3 as an equation (i) in one variable (ii) in two variables

(i) y=3
(ii) y=3 ⇌ 0x+y=3 ⇌ 0x+y-3=0
which is in fact y=3
It is a line parallel to x-axis at a positive distance of 3 from it. We have two of its solutions as (0,3), (1,3).