Question

how to mark y = 3 in two variable graph​

Answer 1

Answer:

X +Y = 0

X + 3 =0

X = 0 - 3

X = -3

mark on graph

where , X = -3 and Y = 3

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Answer 2

Answer:

y = 3 will be a line passing the y axis at y = 3 and parallel to the x axis.