Question

How do you graph the line `y = 4`?

Answer 1

See below.

Explanation:

When graphing `y=4`, you know the `y` value is `4`, so you draw a dot at `(0,4)`, but if you recall from class, if it a single variable, like `y=4`, it goes horizontally, i.e. parallel to the `y`-axis as shown below:

Answer 2

Horizontal line at `y=4`

Explanation:

In slope-intercept form, this equation can be written as

`y=0x+4`, where our slope is zero and `y`-intercept is at `4`.

The only kind of line with a slope of zero is a horizontal line- the only values this equation takes on is when `y=4`; it doesn't matter what `x` is.

We will just have a horizontal line at `y=4`.

graph{y=0x+4 [-9.96, 10.04, -3.08, 6.92]}

Hope this helps!