1. **State the problem:** Solve the system of equations graphically:
$$y = \frac{5}{2}x - 8$$
$$x + 2y = -4$$
2. **Rewrite the second equation in slope-intercept form:**
Start with $$x + 2y = -4$$
Subtract $$x$$ from both sides:
$$2y = -x - 4$$
Divide both sides by 2:
$$y = -\frac{1}{2}x - 2$$
3. **Plot both lines:**
- First line: $$y = \frac{5}{2}x - 8$$ has slope $$\frac{5}{2}$$ and y-intercept $$-8$$.
- Second line: $$y = -\frac{1}{2}x - 2$$ has slope $$-\frac{1}{2}$$ and y-intercept $$-2$$.
4. **Find the intersection point algebraically to confirm the graphical solution:**
Set the two expressions for $$y$$ equal:
$$\frac{5}{2}x - 8 = -\frac{1}{2}x - 2$$
Add $$\frac{1}{2}x$$ to both sides:
$$\frac{5}{2}x + \frac{1}{2}x - 8 = -2$$
Combine like terms:
$$3x - 8 = -2$$
Add 8 to both sides:
$$3x = 6$$
Divide both sides by 3:
$$x = 2$$
Substitute $$x=2$$ into one of the equations to find $$y$$:
$$y = \frac{5}{2} \times 2 - 8 = 5 - 8 = -3$$
5. **Conclusion:**
The lines intersect at the point $$(2, -3)$$, which is the solution to the system.
This means the graphical solution is the point where the two lines cross at $$(2, -3)$$.
Graphical System Ca4148
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.