Inequality Graph 6557B3
1. **State the problem:** We need to graph the system of inequalities:
$$x + y > -3$$
$$y > \frac{3}{2}x - 1$$
and identify the region that satisfies both.
2. **Rewrite inequalities in slope-intercept form:**
For the first inequality:
$$x + y > -3 \implies y > -x - 3$$
The second inequality is already in slope-intercept form:
$$y > \frac{3}{2}x - 1$$
3. **Understand the inequalities:**
- For $$y > -x - 3$$, the solution is the region above the line $$y = -x - 3$$.
- For $$y > \frac{3}{2}x - 1$$, the solution is the region above the line $$y = \frac{3}{2}x - 1$$.
4. **Graphing:**
- Plot the line $$y = -x - 3$$ (dashed because inequality is strict).
- Plot the line $$y = \frac{3}{2}x - 1$$ (dashed as well).
- Shade the region above both lines.
5. **Find the intersection of the boundary lines:**
Solve:
$$-x - 3 = \frac{3}{2}x - 1$$
Add $$x$$ to both sides:
$$-3 = \frac{3}{2}x + x - 1 = \frac{5}{2}x - 1$$
Add 1 to both sides:
$$-2 = \frac{5}{2}x$$
Multiply both sides by $$\frac{2}{5}$$:
$$x = -\frac{4}{5}$$
Find $$y$$:
$$y = -x - 3 = -\left(-\frac{4}{5}\right) - 3 = \frac{4}{5} - 3 = -\frac{11}{5}$$
So the lines intersect at $$\left(-\frac{4}{5}, -\frac{11}{5}\right)$$.
6. **Final answer:** The solution region is the intersection of the half-planes above both lines, i.e., the area above $$y = -x - 3$$ and above $$y = \frac{3}{2}x - 1$$.