Math Problem Statement

Graph the linear function. Give its domain and range. f(x) = -5x + 3

Solution

The given problem asks to graph the linear function and to determine its domain and range. The function provided is:

f(x)=5x+3f(x) = -5x + 3

1. Graphing the Linear Function

The equation f(x)=5x+3f(x) = -5x + 3 is in the slope-intercept form, y=mx+by = mx + b, where:

  • m=5m = -5 is the slope of the line.
  • b=3b = 3 is the y-intercept (where the line crosses the y-axis).

Steps to graph:

  1. Start at the y-intercept (0,3)(0, 3).
  2. Use the slope 5-5 (which means for every 1 unit you move to the right, you move 5 units down) to plot additional points.
  3. Connect the points to form the line.

2. Domain and Range

  • Domain: Since this is a linear function, the domain is all real numbers, because you can plug any xx-value into the function.

    Domain=(,)\text{Domain} = (-\infty, \infty)

  • Range: Similarly, the range is also all real numbers, because the line extends infinitely in both vertical directions as xx increases or decreases.

    Range=(,)\text{Range} = (-\infty, \infty)

Would you like further details, such as a graph or more explanation on how the slope works?

Here are 5 related questions to expand on this:

  1. What are the key features of a linear function in slope-intercept form?
  2. How does changing the slope affect the steepness of the line?
  3. How do you find the x-intercept of a linear function?
  4. What is the significance of the y-intercept in real-world applications?
  5. How can linear functions be used to model real-world scenarios?

Tip: When graphing a line, always start with the y-intercept and use the slope to determine the direction and steepness of the line.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions

Formulas

f(x) = mx + b
Domain and Range

Theorems

Slope-Intercept Form

Suitable Grade Level

Grades 8-10