Find the equation of a horizontal line that goes through the point (5, -3). Explain your answer

Answer 1

any horizontal line has equation y = c , where c is the y element of your given point
so
y = -3

or, the long way:

slope of a horizontal line is 0 , then
y = 0x + b
plug in the given point(5,-3)
-3 = 0(5) + b
b = -3

y = 0x - 3
y = -3