1. Problem: Describe the transformations from $f(x)$ to $r(x)$ or $g(x)$ for each given function.
2. Recall the transformation rules:
- Vertical stretch/shrink: multiplying $f(x)$ by a factor $a$ changes the vertical scale by $a$.
- Horizontal stretch/shrink: replacing $x$ by $bx$ changes the horizontal scale by $1/b$.
- Translation: adding/subtracting constants inside or outside the function shifts the graph.
- Reflection: multiplying by $-1$ reflects over the x-axis; replacing $x$ by $-x$ reflects over the y-axis.
3. Analyze each case:
1. $f(x) = x + 2$, $r(x) = f(3x)$
- Horizontal shrink by factor $1/3$ (since $x$ replaced by $3x$)
- No vertical stretch/shrink (factor 1)
- No vertical translation
- No horizontal translation
- No reflection
2. $f(x) = 3x + 6$, $r(x) = \frac{1}{3} f(x)$
- Vertical shrink by factor $1/3$
- No horizontal stretch/shrink
- No translation
- No reflection
3. $f(x) = -3 - x$, $h(x) = f(-x)$
- Reflection over y-axis (replace $x$ by $-x$)
- No vertical or horizontal stretch/shrink
- No translation
4. $f(x) = \frac{1}{3} x + 1$, $h(x) = -f(x)$
- Reflection over x-axis (multiply by $-1$)
- No stretch/shrink
- No translation
5. $f(x) = 5x - 10$, $r(x) = f(\frac{2}{5} x)$
- Horizontal stretch by factor $\frac{5}{2}$ (since $x$ replaced by $\frac{2}{5} x$)
- No vertical stretch/shrink
- No translation
6. $f(x) = -\frac{1}{3} x + 2$, $r(x) = 6 f(x)$
- Vertical stretch by factor 6
- No horizontal stretch/shrink
- No translation
- Reflection over x-axis included in $f(x)$ (due to negative slope)
7. $f(x) = -3x + 5$, $g(x) = f(x - 3)$
- Horizontal translation right by 3
- No stretch/shrink
- No vertical translation
8. $f(x) = -2x + 6$, $g(x) = f(\frac{4}{3} x)$
- Horizontal shrink by factor $\frac{3}{4}$
- No vertical stretch/shrink
- No translation
9. $f(x) = 4x - 3$, $g(x) = \frac{1}{2} f(x)$
- Vertical shrink by factor $\frac{1}{2}$
- No horizontal stretch/shrink
- No translation
10. $f(x) = -2x$, $g(x) = f(x) + 3$
- Vertical translation up by 3
- No stretch/shrink
- No horizontal translation
Final answers:
1. Vertical stretch: 1, Vertical shrink: 1/3, Horizontal stretch: 1, Horizontal shrink: 3, Translate up/down: 0, Translate left/right: 0, Reflect: none
2. Vertical stretch: 1/3, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: 0, Reflect: none
3. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: 0, Reflect: over y axis
4. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: 0, Reflect: over x axis
5. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 5/2, Horizontal shrink: 2/5, Translate up/down: 0, Translate left/right: 0, Reflect: none
6. Vertical stretch: 6, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: 0, Reflect: over x axis (from $f$)
7. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: right 3, Reflect: none
8. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 3/4, Translate up/down: 0, Translate left/right: 0, Reflect: none
9. Vertical stretch: 1/2, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: 0, Translate left/right: 0, Reflect: none
10. Vertical stretch: 1, Vertical shrink: 1, Horizontal stretch: 1, Horizontal shrink: 1, Translate up/down: up 3, Translate left/right: 0, Reflect: none
Graph Transformations
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.