Slope is a number that represents how much the y-value changes over a certain span of x-values. However, since y is a constant set to 3, the y-value never changes, meaning the slope is 0.
The slope will always be 0 for any equation that has the form:
You could also choose two random points and solve for the slope. Let's take (0,3) and (1,3).
You can verify these are actual points on the line since the y-value is 3.
Now, let's calculate for slope:
The slope is indeed 0 as shown from this.
Let me know if you need any clarifications, thanks!
~ Padoru