There is a line whose slope is 0 and whose y - intercept is 9. What is its equation in slope-intercept form?

y = 0x + 9

Step-by-step explanation:

the equation of a line in slope - intercept form is

y = mx + c (m is the slope and c the y-intercept)

here m = 0 and c = 9, hence

y = 0x + 9

The equation of a horizontal line is normally written as y = 9

with the x - term omitted