Answer:
The equation of the horizontal line passing through (4, 9) will be:
[tex]y=9[/tex]
Please also check the attached line graph.
Step-by-step explanation:
We know that the equation of a horizontal line is always the kind of equation such as:
[tex]y=k[/tex]
Thus, the equation of the horizontal line passing through (4, 9) will be:
[tex]y=9[/tex]
Please also check the attached line graph.