Graphing the Equations on a Coordinate Plane

Oct 13, 2025 by talynt.org 82 views

Introduction

In mathematics, solving linear equations is a fundamental concept that involves finding the values of variables that satisfy the given equation. One of the effective ways to solve linear equations is through graphical representation, where the equations are plotted on a coordinate plane to visualize the solution. In this article, we will explore how Becca graphs the equations $y = -3(x-1)$ and $y = x - 5$ to solve the equation $-3(x-1) = x - 5$ .

Graphing the Equations

To graph the equations, we need to understand the concept of slope-intercept form, which is given by $y = mx + b$ , where $m$ is the slope and $b$ is the y-intercept. The equation $y = -3(x-1)$ can be rewritten as $y = -3x + 3$ , where the slope is $-3$ and the y-intercept is $3$ . Similarly, the equation $y = x - 5$ has a slope of $1$ and a y-intercept of $-5$ .

# Graphing the Equations

## Equation 1: y = -3(x-1)
### Slope-Intercept Form
y = -3x + 3

## Equation 2: y = x - 5
### Slope-Intercept Form
y = x - 5

Graphing the Equations on a Coordinate Plane

To graph the equations on a coordinate plane, we need to plot the points that satisfy the equations. For the equation $y = -3(x-1)$ , we can start by plotting the point $(0, 3)$ , which is the y-intercept. Then, we can plot the point $(1, 0)$ , which is the x-intercept. By drawing a line through these two points, we can obtain the graph of the equation.

Similarly, for the equation $y = x - 5$ , we can plot the point $(0, -5)$ , which is the y-intercept. Then, we can plot the point $(5, 0)$ , which is the x-intercept. By drawing a line through these two points, we can obtain the graph of the equation.

# Graphing the Equations on a Coordinate Plane

## Equation 1: y = -3(x-1)
### Plotting the Points
(0, 3)
(1, 0)

## Equation 2: y = x - 5
### Plotting the Points
(0, -5)
(5, 0)

Finding the Solution

To find the solution to the equation $-3(x-1) = x - 5$ , we need to find the point of intersection between the two graphs. By observing the graphs, we can see that the two lines intersect at the point $(2, -1)$ .

# Finding the Solution

## Point of Intersection
(2, -1)

Conclusion

In conclusion, Becca graphs the equations $y = -3(x-1)$ and $y = x - 5$ to solve the equation $-3(x-1) = x - 5$ . By plotting the points that satisfy the equations and drawing the lines through these points, we can obtain the graphs of the equations. By observing the graphs, we can find the point of intersection, which is the solution to the equation.

Final Answer

The solution to the equation $-3(x-1) = x - 5$ is $(2, -1)$ .

Additional Information

The equation $-3(x-1) = x - 5$ can be rewritten as $-3x + 3 = x - 5$ .
By adding $3x$ to both sides of the equation, we get $3 = 4x - 5$ .
By adding $5$ to both sides of the equation, we get $8 = 4x$ .
By dividing both sides of the equation by $4$ , we get $2 = x$ .
Therefore, the solution to the equation is $x = 2$ .

# Additional Information

## Rewriting the Equation
-3(x-1) = x - 5
-3x + 3 = x - 5

## Adding 3x to Both Sides
3 = 4x - 5

## Adding 5 to Both Sides
8 = 4x

## Dividing Both Sides by 4
2 = x
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**Q&A: Solving Linear Equations through Graphical Representation**
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**Introduction**
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In our previous article, we explored how Becca graphs the equations $y = -3(x-1)$ and $y = x - 5$ to solve the equation $-3(x-1) = x - 5$. In this article, we will answer some frequently asked questions related to solving linear equations through graphical representation.

**Q: What is the purpose of graphing linear equations?**
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A: The purpose of graphing linear equations is to visualize the solution to the equation. By plotting the points that satisfy the equation and drawing the line through these points, we can obtain the graph of the equation. This can help us to identify the solution to the equation.

**Q: How do I graph a linear equation?**
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A: To graph a linear equation, you need to plot the points that satisfy the equation and draw the line through these points. You can start by plotting the y-intercept, which is the point where the line intersects the y-axis. Then, you can plot the x-intercept, which is the point where the line intersects the x-axis. By drawing a line through these two points, you can obtain the graph of the equation.

**Q: What is the point of intersection?**
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A: The point of intersection is the point where the two lines intersect. This is the solution to the equation. By finding the point of intersection, we can determine the values of the variables that satisfy the equation.

**Q: How do I find the point of intersection?**
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A: To find the point of intersection, you need to graph the two equations on the same coordinate plane. Then, you can observe the graphs to find the point where the two lines intersect. This is the point of intersection.

**Q: What are some common mistakes to avoid when graphing linear equations?**
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A: Some common mistakes to avoid when graphing linear equations include:

*   Plotting the points incorrectly
*   Drawing the line through the points incorrectly
*   Failing to observe the point of intersection
*   Failing to check the solution

**Q: How can I check the solution?**
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A: To check the solution, you need to substitute the values of the variables into the equation and simplify. If the equation is true, then the solution is correct. If the equation is false, then the solution is incorrect.

**Q: What are some real-world applications of solving linear equations through graphical representation?**
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A: Some real-world applications of solving linear equations through graphical representation include:

*   Finding the cost of goods sold
*   Determining the profit or loss of a business
*   Calculating the interest on a loan
*   Finding the area or perimeter of a shape

**Q: How can I use technology to graph linear equations?**
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A: You can use technology such as graphing calculators or computer software to graph linear equations. These tools can help you to plot the points and draw the line through the points, making it easier to find the point of intersection.

**Conclusion**
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In conclusion, solving linear equations through graphical representation is a powerful tool that can help us to visualize the solution to the equation. By graphing the equations and finding the point of intersection, we can determine the values of the variables that satisfy the equation. We hope that this article has provided you with a better understanding of how to solve linear equations through graphical representation.

**Additional Resources**
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*   Graphing calculators
*   Computer software
*   Online graphing tools
*   Math textbooks and resources

```markdown
# Additional Resources

## Graphing Calculators
*   Texas Instruments TI-83 Plus
*   Casio Prizm FX-CG50
*   HP Prime Graphing Calculator

## Computer Software
*   Graphing software such as Graphing Calculator 3D
*   Math software such as Mathematica
*   Online graphing tools such as Desmos

## Online Graphing Tools
*   Desmos
*   GeoGebra
*   Mathway

## Math Textbooks and Resources
*   Algebra and Trigonometry by Michael Sullivan
*   Calculus by Michael Spivak
*   Khan Academy
*   MIT OpenCourseWare