Question

Is the line with equation x = 4 horizontal or vertical? What is the slope of this line?

Is the line with equation y = -8 horizontal or vertical? What is the slope of this line?

Answer 1

x=4 is vertical because it's a function of x and its slope in terms of the function y=mx+b is said to be "undefined"

y=-8 is horizontal because its a function of y and its slope in terms of the function y=mx+b is zero (0)

<3

Answer 2

Oh my pre-algebra! u are very smart ;)