Question: Use the graph to determine the following.
a. the function's domain
b. the function's range
c. the x-intercepts, if any
d. the y-intercept, if any
e. the function value f left parenthesis negative 2 right parenthesis
A coordinate system has a horizontal x-axis labeled from negative 10 to 10 in increments of 1 and vertical y-axis labeled from negative 10 to 10 in increments of 1. A curve falls from left to right from an open circle at left parenthesis negative 3, 8 right parenthesis to a closed circle at left parenthesis 0, negative 1 right parenthesis, passing through the points left parenthesis negative 2, 3 right parenthesis and left parenthesis negative 1, 0 right parenthesis .
1. **State the problem:**
We are given a graph of a function with points and asked to find:
a. the domain
b. the range
c. the x-intercepts
d. the y-intercept
e. the value of the function at $x=-2$
2. **Analyze the graph:**
- The curve starts at an open circle at $(-3,8)$ and ends at a closed circle at $(0,-1)$.
- It passes through $(-2,3)$ and $(-1,0)$.
3. **Find the domain:**
- The domain is the set of all $x$ values for which the function is defined.
- Since the curve starts at $x=-3$ (open circle means $-3$ is not included) and ends at $x=0$ (closed circle means $0$ is included), the domain is:
$$(-3, 0]$$
4. **Find the range:**
- The range is the set of all $y$ values the function takes.
- The highest $y$ value is $8$ at $x=-3$ (open circle, so $8$ is not included).
- The lowest $y$ value is $-1$ at $x=0$ (closed circle, so $-1$ is included).
- The function passes through $3$ and $0$ as well.
- So the range is:
$$(-1, 8)$$
Note: Since the open circle at $8$ means $8$ is not included, and the closed circle at $-1$ means $-1$ is included, the range is actually:
$$[-1, 8)$$
5. **Find the x-intercepts:**
- The x-intercepts are points where $y=0$.
- The graph passes through $(-1,0)$, so the x-intercept is:
$$-1$$
6. **Find the y-intercept:**
- The y-intercept is where $x=0$.
- The graph has a closed circle at $(0,-1)$, so the y-intercept is:
$$-1$$
7. **Find $f(-2)$:**
- From the graph, at $x=-2$, $y=3$.
- So:
$$f(-2) = 3$$