Write the equation of the line.

y = -7

Step-by-step explanation:

x = 0

y = -7

X=-7

Step-by-step explanation:

Vertical line is created when it is X= #

and

Horizontal line is created when Y= #

It is simply the opposite direction of the Axis

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!