To determine the x-intercept of the equation $y = x + 3$, we set $y = 0$, because the x-intercept is the point where the graph crosses the x-axis (and $y = 0$ at that point).

1. Substitute $y = 0$ into $y = x + 3$: $0 = x + 3$

2. Solve for $x$: $x = -3$

Thus, the x-intercept is at $(-3, 0)$.

Would you like me to help with graphing this equation or any additional details?

Here are 5 related questions to expand your understanding:

1. How do you determine the y-intercept of a line?
2. What is the slope of the line $y = x + 3$, and how does it affect the graph?
3. How do you graph a line step-by-step on a coordinate plane?
4. What does the slope-intercept form of a line ($y = mx + b$) tell you about a graph?
5. How can you verify the solution for the x-intercept graphically?

Tip: The slope $m$ in $y = mx + b$ tells you how steep the line is, and the $b$ represents where the line crosses the y-axis.