Question

How do you graph `y=7` by plotting points?

Answer 1

It's a line parallel to the `x` axis passing through `7` on the `y` axis.

Explanation:

There are other ways to understand graphing.
For this question, you should look at a graph as a set of points that satisfy a certain condition.
For example, the graph `y=x` is a set of all points whose `x` component is equal to its `y` component. In mathematics, this is called a set. We notate the set of all points who satisfy `y=x` as follows:
`P={(x, y)|y=x}`

Anyways, back to your original question, we can rewrite the equation as:
`P={(x, y)|y=7}`
Which is essentially a set of all points who has a `y` component of `7`. Notice how the `x` value does not matter.

It's a line parallel to the `x` axis passing through `7` on the `y` axis.