1. **State the problem:** We need to graph the inequality $$-5x + 2y > -8$$ on the Cartesian coordinate system.
2. **Rewrite the inequality in slope-intercept form:** To graph, express $$y$$ in terms of $$x$$.
Start with:
$$-5x + 2y > -8$$
Add $$5x$$ to both sides:
$$\cancel{-5x} + 2y > -8 + 5x$$
$$2y > 5x - 8$$
Divide both sides by 2:
$$\frac{2y}{\cancel{2}} > \frac{5x - 8}{\cancel{2}}$$
$$y > \frac{5}{2}x - 4$$
3. **Interpret the inequality:**
- The boundary line is $$y = \frac{5}{2}x - 4$$.
- Since the inequality is strict ($$>$$), the boundary line is dashed.
- The solution region is above the line because $$y$$ is greater than the expression.
4. **Graphing steps:**
- Plot the boundary line $$y = \frac{5}{2}x - 4$$ as a dashed line.
- To plot, find intercepts:
- When $$x=0$$, $$y = -4$$.
- When $$y=0$$, solve $$0 = \frac{5}{2}x - 4$$:
$$\frac{5}{2}x = 4$$
$$x = \frac{4}{\frac{5}{2}} = \frac{4 \times 2}{5} = \frac{8}{5} = 1.6$$
- Shade the region above the line.
This completes the graphing of the inequality.
Graph Inequality 390F09
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.