
Jason D. answered 04/11/19
Information Security Engineer Global Fortune 400 Enterprise 4 yrs Exp
x can take any value. There is no slope. so the set for x is (-∞,∞).
the function takes on the form of a horizontal straight line intercepting the y axis at y=-5.
some values on this graph are as follows:
(1,-5)
(0,-5)
(-1,-5)
(20,-5)
and so on.
putting it into slope-intercept form, y=mx + b, it comes out y= 0*x -5
at the risk of flogging a dead horse,
another way you can confirm the zero slope is to take the first derivative of the function, where f'(x)=0.