Question

How do you write an equation of a line with (-2,5), (9,5)?

Answer 1

The standard equation for a line with slope `m` and intercept `c` is of the form `y = mx+c`.

In the case of a line passing through `(-2,5)` and `(9,5)` the value of `y` is unchanged despite the two distinct values of `x`. So the slope `m` must be zero and `c` must be `5`...

`y = 5`

or in strict slope intercept form you could write

`y = 0x + 5`