Question

How do you write the equation of the horizontal line passing through the point (3,15)?

Answer 1

`y = 15`

Explanation:

Horizontal lines have the equation `y = ....`

As the slope is 0, there is no `x`-term and the `y`-value stays the same, regardless what value of x is chosen.

From the given point `(3,15)` we see that the `y`-value is 15.

The equation is therefore.
`y = 15`