The equation given is $y = -3$, which represents a horizontal line. In this case, the y-value is constant at $-3$ for all values of $x$.

Steps to graph the equation $y = -3$:

1. Plot points: Since the y-value is constant, every point will have a y-coordinate of $-3$, regardless of the x-value.
   • For example:
     • $(x, y) = (0, -3)$
     • $(x, y) = (1, -3)$
     • $(x, y) = (-2, -3)$
2. Draw a horizontal line through these points. Since the line is horizontal, it will be parallel to the x-axis and cross the y-axis at $-3$.

If you were using a graphing tool, you'd mark these points on the graph and then draw a straight horizontal line through them.

Do you want me to clarify any steps or provide more details?

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Here are 5 related questions to expand your understanding:

1. What is the slope of a horizontal line like $y = -3$?
2. How would the graph look if the equation were $y = 3$ instead?
3. How do you determine if a line is horizontal or vertical from its equation?
4. Can you think of another example of an equation that results in a horizontal line?
5. What happens to the graph if we change the equation to $y = x - 3$?

Tip: Horizontal lines have a slope of zero, since there is no vertical change, only horizontal movement!