Inequality Graphs 787B52
1. **Problem Statement:**
We need to sketch the graphs of the inequalities:
a. $3x - 3 < y$
b. $3 > y$
c. $3x - 2y \leq 6$
d. $x^2 - y \leq 9$
2. **Understanding each inequality:**
- For (a), the inequality $3x - 3 < y$ means the region above the line $y = 3x - 3$, but not including the line itself (dashed boundary).
- For (b), $3 > y$ means $y < 3$, so the region below the horizontal line $y = 3$, not including the line (dashed boundary).
- For (c), $3x - 2y \leq 6$ can be rewritten to express $y$:
$$3x - 2y \leq 6 \implies -2y \leq 6 - 3x \implies y \geq \frac{3x - 6}{2}$$
This means the region above or on the line $y = \frac{3x - 6}{2}$ (solid boundary).
- For (d), $x^2 - y \leq 9$ can be rewritten as:
$$-y \leq 9 - x^2 \implies y \geq x^2 - 9$$
This is the region above or on the parabola $y = x^2 - 9$ (solid boundary).
3. **Summary of boundaries and regions:**
- (a) Line: $y = 3x - 3$, region above, dashed line.
- (b) Line: $y = 3$, region below, dashed line.
- (c) Line: $y = \frac{3x - 6}{2}$, region above or on, solid line.
- (d) Parabola: $y = x^2 - 9$, region above or on, solid curve.
4. **Graphing notes:**
- Dashed lines indicate the boundary is not included.
- Solid lines indicate the boundary is included.
- Regions are shaded accordingly.
5. **Final expressions for graphing:**
- (a) $y > 3x - 3$
- (b) $y < 3$
- (c) $y \geq \frac{3x - 6}{2}$
- (d) $y \geq x^2 - 9$
These inequalities describe the shaded regions on their respective graphs.