Write the equation of the line that passes through point (5, 4) with a slope of 0. would this be x=5 then?

no
x=5 is the equation of the vertical line passing through (5,4)

Any horizontal line, (slope=0), has an equation of the form y = b

notice that this is a variation of the form y = 0x + b, clearly the slope is zero.

So what is your equation?

y= 5 this is what i met to type last time so it this correct?

no, not y=5

look at your point. What is the y value??

your equation is y = 4

Yes, that is correct. The equation of the line with a slope of 0 passing through the point (5, 4) is y = 4. Since the slope is 0, the line is horizontal, and the y-coordinate remains constant for all x-values.