Question: User: Part 4 of 8
Use the graph of the function.
21. Identify the domain and range of the function.
22. Identify the x- and y-intercepts of the function.
23. Determine over what interval the function is positive or negative.
24. Determine over what interval the function is increasing or decreasing.
22. Identify all x-intercepts. Select the correct choice below and fill in any answer boxes within your choice.
A. The x-intercept(s) is(are) -5,3.
(Type your answer(s) as integers or simplified fractions. Use a comma to separate answers as needed.)
B. There are no x-intercepts.
Identify all y-intercepts. Select the correct choice below, and fill in any answer boxes within your choice.
A. The y-intercept(s) is(are) 4.
(Type your answer(s) as integers or simplified fractions. Use a comma to separate answers as needed.)
B. There are no y-intercepts.
Graph shape and math (top-right): A piecewise linear graph with solid points at $(-5, 0)$, $(-1, 2)$, and $(5, -1)$, connected by straight line segments; it crosses the y-axis at $(0, 1)$ and the x-axis at $x = -5$ and $x = 3$.
1. **State the problem:** We analyze the given piecewise linear function with points $(-5,0)$, $(-1,2)$, $(5,-1)$, crossing the y-axis at $(0,1)$ and x-axis at $x=-5$ and $x=3$.
2. **Domain and Range:**
- The domain is all $x$ values covered by the graph, from the leftmost to rightmost points.
- The range is all $y$ values the function attains.
3. **Domain:** The graph extends from $x=-5$ to $x=5$, so domain is $$[-5,5].$$
4. **Range:** The lowest $y$ value is $-1$ at $x=5$, highest is $2$ at $x=-1$, so range is $$[-1,2].$$
5. **X-intercepts:** Points where $y=0$.
- Given points $(-5,0)$ and the graph crosses $x=3$ on x-axis.
- So x-intercepts are $$-5, 3.$$
6. **Y-intercept:** Point where $x=0$.
- Given as $(0,1)$, so y-intercept is $$1.$$
7. **Intervals where function is positive or negative:**
- Positive means $y>0$, negative means $y<0$.
- From $x=-5$ to $x=0$, $y$ goes from $0$ to $1$ and up to $2$ at $x=-1$, so $y>0$ on $(-5,0]$ except at $x=-5$ where $y=0$.
- From $x=0$ to $x=3$, $y$ decreases from $1$ to $0$, so $y>0$ on $(0,3)$.
- From $x=3$ to $x=5$, $y$ goes from $0$ to $-1$, so $y<0$ on $(3,5]$.
8. **Intervals where function is increasing or decreasing:**
- Increasing means $y$ rises as $x$ increases.
- Decreasing means $y$ falls as $x$ increases.
- From $x=-5$ to $x=-1$, $y$ rises from $0$ to $2$, so increasing on $[-5,-1]$.
- From $x=-1$ to $x=5$, $y$ falls from $2$ to $-1$, so decreasing on $[-1,5]$.
**Final answers:**
- Domain: $$[-5,5]$$
- Range: $$[-1,2]$$
- X-intercepts: $$-5, 3$$
- Y-intercept: $$1$$
- Positive intervals: $$(-5,3)$$
- Negative intervals: $$(3,5]$$
- Increasing interval: $$[-5,-1]$$
- Decreasing interval: $$[-1,5]$$