Math Problem Statement

Graph the line represented by the equation 3x + 4y = 12. Select two points on the coordinate grid to represent the x- and y-intercepts. A line will connect the points.

Solution

The equation in the image is 3x+4y=123x + 4y = 12. To graph this, let's find the intercepts and use them to plot the line.

Finding the intercepts:

  1. For the x-intercept: Set y=0y = 0 in the equation 3x+4y=123x + 4y = 12. 3x+4(0)=12    3x=12    x=43x + 4(0) = 12 \implies 3x = 12 \implies x = 4 So, the x-intercept is (4,0)(4, 0).

  2. For the y-intercept: Set x=0x = 0 in the equation 3x+4y=123x + 4y = 12. 3(0)+4y=12    4y=12    y=33(0) + 4y = 12 \implies 4y = 12 \implies y = 3 So, the y-intercept is (0,3)(0, 3).

Plotting:

  • The x-intercept is (4,0)(4, 0).
  • The y-intercept is (0,3)(0, 3).

To graph the line, plot these two points (4,0)(4, 0) and (0,3)(0, 3) on the grid and connect them with a straight line.

Let me know if you'd like to see further details, or if you have any other questions! Here are some related questions:

  1. How do you find the slope of the line from the equation?
  2. How can you rewrite the equation 3x+4y=123x + 4y = 12 in slope-intercept form?
  3. What is the slope of this line, and how does it relate to the intercepts?
  4. How would the graph change if the equation were 3x+4y=83x + 4y = 8?
  5. What are the general steps to graph any linear equation?

Tip: When graphing lines, finding both intercepts can quickly provide two key points to sketch the line.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

3x + 4y = 12
x-intercept formula: y = 0
y-intercept formula: x = 0

Theorems

Intercept Theorem
Equation of a Line

Suitable Grade Level

Grades 7-10