1. **State the problem:** Find the equation of a line parallel to the line $y = 2x + 8$ that passes through the point $(-4, 9)$.
2. **Recall the rule for parallel lines:** Parallel lines have the same slope. The given line has slope $m = 2$.
3. **Use the point-slope form of a line:**
$$y - y_1 = m(x - x_1)$$
where $(x_1, y_1)$ is the point the line passes through, and $m$ is the slope.
4. **Substitute the known values:**
$$y - 9 = 2(x - (-4))$$
which simplifies to
$$y - 9 = 2(x + 4)$$
5. **Final equation:**
$$y - 9 = 2(x + 4)$$
This matches the option: $y - 9 = 2(x + 4)$.
Hence, the equation of the line parallel to $y=2x+8$ passing through $(-4,9)$ is:
$$y - 9 = 2(x + 4)$$
Parallel Line 879Cd5
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.