To get the slope of an equation just differentiate it with respect to the independent variable.
d/dx (y = a)
dy/dx = d/dx (a)
{dy/dx = y'} a has no x term so {d/dx (a) = 0}
y' = 0 and since y' represents the slope, the slope is equal to 0
Or you could just know that a y=a is a horizontal line, therefore the slope is always 0, no matter what a equals.
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y equals 3x has the greater slope.
Slope is 6.
The slope is -3 .
y=x y=1x The slope is one.
That line is horizontal on the graph. Its slope is zero.