Math Problem Statement

Graph the function f ( x )

4 x + 2 by moving the key points.

Solution

To graph the function f(x)=4x+2f(x) = 4x + 2, we will start by plotting key points. This is a linear function, which means the graph will be a straight line. The general form of a linear function is f(x)=mx+bf(x) = mx + b, where:

  • mm is the slope
  • bb is the y-intercept

For f(x)=4x+2f(x) = 4x + 2:

  • The slope m=4m = 4, meaning the line rises 4 units for every 1 unit it moves to the right.
  • The y-intercept b=2b = 2, which means the line crosses the y-axis at (0,2)(0, 2).

Key Steps for Graphing:

  1. Plot the y-intercept: The line crosses the y-axis at (0,2)(0, 2).
  2. Use the slope: Starting at (0,2)(0, 2), use the slope of 4 to find another point. From (0,2)(0, 2), move up 4 units and 1 unit to the right, landing on (1,6)(1, 6).
  3. Draw the line: Connect these points and extend the line in both directions.

Key Points:

  • (0,2)(0, 2)
  • (1,6)(1, 6)
  • (1,2)(-1, -2) (Moving left from the y-intercept: down 4 units and 1 unit to the left)

This gives you a straight line that can be plotted on the graph.

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Here are 5 related questions you might find interesting:

  1. What is the slope of the line for the equation f(x)=4x+2f(x) = 4x + 2?
  2. How do you graph a line given its slope and y-intercept?
  3. How would you graph the equation f(x)=2x+3f(x) = -2x + 3?
  4. What happens to the graph if the slope changes to 0?
  5. How do you find the x-intercept of the line f(x)=4x+2f(x) = 4x + 2?

Tip: Always start graphing linear equations by plotting the y-intercept first and then use the slope to find another point.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Functions
Graphing

Formulas

f(x) = mx + b

Theorems

Slope-Intercept Form
Graphing Linear Functions

Suitable Grade Level

Grades 7-9