Math Problem Statement

A part of linear function g is graphed on the grid.

Which inequalities best describe the domain and range of the part shown? A.Domain:−7<x<6

Range:−4<g(x)<5

B.Domain:−7≤x≤6

Range:−4≤g(x)≤5

C. Domain:−4≤x≤5

Range:−7≤g(x)≤6

D.Domain:−4<x<5

Range:−7<g(x)<6

Solution

To solve this problem, let’s first define the domain and range of a graphed function:

  1. Domain: The set of all possible input values (x-values) for which the function is defined.
  2. Range: The set of all possible output values (y-values, or g(x)) for the function.

For each option, the inequalities describe the domain and range.

  • Domain: Refers to the interval of xx-values (from left to right on the graph).
  • Range: Refers to the interval of g(x)g(x) or yy-values (from bottom to top on the graph).

Let’s break down the options:

A. Domain: 7<x<6-7 < x < 6, Range: 4<g(x)<5-4 < g(x) < 5

  • The inequalities in the domain and range are strict, meaning that the function does not include the endpoints.

B. Domain: 7x6-7 \leq x \leq 6, Range: 4g(x)5-4 \leq g(x) \leq 5

  • The inequalities are inclusive, meaning the function includes the endpoints of the domain and range.

C. Domain: 4x5-4 \leq x \leq 5, Range: 7g(x)6-7 \leq g(x) \leq 6

  • The domain and range appear reversed when compared to the rest.

D. Domain: 4<x<5-4 < x < 5, Range: 7<g(x)<6-7 < g(x) < 6

  • Both domain and range use strict inequalities, and the intervals are reversed.

Choosing the Correct Answer

Without the graph, option B seems the most reasonable as it includes the endpoint values, which is common in such questions. If the graph shows the function defined at those boundary points, then B is the best choice.


Let me know if you'd like further details or have any questions! Here are 5 related questions to explore:

  1. How do you find the domain and range of a function from a graph?
  2. What is the difference between strict and inclusive inequalities?
  3. How do you find the domain and range of a linear function algebraically?
  4. What is the significance of endpoint inclusion in a domain or range?
  5. How would you represent a function with an infinite domain or range?

Tip: Always check if the endpoints are included in the graph to decide between strict (<) and inclusive () inequalities.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Domain and Range
Inequalities

Formulas

Domain and Range of Functions
Graphing Linear Functions

Theorems

Properties of Linear Functions
Definition of Domain and Range

Suitable Grade Level

Grades 9-11