Math Problem Statement
Graph the linear equation x + 4y = -8
Solution
The given equation is:
To graph this linear equation, it's helpful to convert it to slope-intercept form (), where is the slope and is the y-intercept.
Step 1: Solve for
Start by isolating on one side of the equation.
Subtract from both sides:
Now, divide both sides by 4:
Step 2: Identify the slope and y-intercept
- The slope () is , meaning the line goes down 1 unit for every 4 units it moves to the right.
- The y-intercept () is , meaning the line crosses the y-axis at .
Step 3: Plotting the line
- Start by plotting the y-intercept .
- Use the slope to find another point. From , move right 4 units (positive direction on the x-axis) and move down 1 unit (negative direction on the y-axis) to get the point .
- Draw a straight line through the points and .
Would you like me to provide the graph as well? Let me know if you'd like further details or if you have questions!
Here are some related questions:
- How can you find the x-intercept of a linear equation?
- What does the slope of a line represent geometrically?
- How do you graph a line if you are given two points?
- How do you convert a standard form equation to slope-intercept form?
- What is the significance of a negative slope in a linear equation?
Tip: Always try to find both intercepts (x and y) for better accuracy when graphing lines.
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Graphing
Slope-Intercept Form
Formulas
Slope-intercept form y = mx + b
Theorems
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Suitable Grade Level
Grades 8-10