Given:
The required line is perpendicular to y=3.
Passing point =(- 4, 4)
Any line perpendicular to y = A is given by:
![x=B](https://img.qammunity.org/2023/formulas/mathematics/college/eybu1z7qiy4q4c8z6oxd3d63sl3qsz7pjr.png)
Where B is the passing coordinate of line.
Now the required line passes through (-4,4) and perpendicular to y=3 is given by:
![x=-4](https://img.qammunity.org/2023/formulas/mathematics/high-school/wcn1xvhdqswk4z8d45ock4ayhxlpyrm9zt.png)
The required equation of line is x= - 4