ILL GIVE BRAINLY THING
What is the equation of the line in the graph?

Answer:
y=5
Step-by-step explanation:
That is literally what horizontal lines' equations would be like.
The slope would be 0, so y=0x and the y-intercept would be 5 so y=0x+5 which is useless to keep the 0x so it becomes y=5.