Math Problem Statement

Figure 2.22(b) shows the graph of y = f(x). (a) Estimate f(0), f(2), f(3), and f(4). (b) What is the domain of f? (c) What is the range of f? (d) What is an x-intercept f?

Solution

Let's go through the problem and analyze it in parts:

Problem Overview:

  • The figure has two graphs of the function y=f(x)y = f(x), showing different segments of the function.
  • We are asked to estimate values of f(x)f(x), identify the domain and range, and find the x-intercept.

(a) Estimating f(0)f(0), f(2)f(2), f(3)f(3), and f(4)f(4):

From the graph in figure (b):

  • f(0)f(0): When x=0x = 0, from the graph, f(0)1f(0) \approx 1.
  • f(2)f(2): When x=2x = 2, the value of the function is f(2)=2f(2) = 2.
  • f(3)f(3): When x=3x = 3, the value is f(3)=2f(3) = 2 (there's a horizontal line here).
  • f(4)f(4): When x=4x = 4, the value is f(4)=3f(4) = 3.

(b) Domain of ff:

Looking at the graph in figure (b), the function starts at x=0x = 0 and goes up to x=4x = 4, but notice there are gaps between the segments. So, the domain excludes some points: [ \text{Domain of } f = [0, 1] \cup [2, 3] \cup [4, 4] ] This means the function is defined for these intervals, but not for x=1x = 1 and x=3x = 3.

(c) Range of ff:

From the graph, the y-values (function outputs) cover the range:

  • The function takes values from 1 to 3, with gaps at certain points. So, the range is: Range of f=[1,3]\text{Range of } f = [1, 3]

(d) x-intercept of ff:

The x-intercept occurs when f(x)=0f(x) = 0. From the graph in figure (b), we observe that f(x)=0f(x) = 0 when x=1x = 1.


Would you like any further details or explanations on these parts?

Here are 5 questions related to this:

  1. How does the gap in the domain affect the continuity of the function f(x)f(x)?
  2. Can we deduce whether the function is increasing or decreasing on specific intervals?
  3. What is the significance of the open circles at x=1x = 1 and x=3x = 3?
  4. How would the range change if the graph extended beyond x=4x = 4?
  5. Is the function symmetric about any particular point or line?

Tip: When finding domain and range, always check for discontinuities (gaps) in the graph that could exclude values.

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Math Problem Analysis

Mathematical Concepts

Functions
Graph Interpretation
Domain and Range
x-intercepts

Formulas

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Theorems

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Suitable Grade Level

High School (Grades 9-12)