Identifying a Point on the Graph

Oct 13, 2025 by wbrum.org 120 views

Introduction

In mathematics, equations are used to represent relationships between variables. When given an equation in a specific form, we can rewrite it to identify key points on the graph. In this article, we will rewrite the equation $y - 2 = -\frac{2}{3}(x - (-1))$ to identify a point on the graph.

Rewriting the Equation

The given equation is $y - 2 = -\frac{2}{3}(x - (-1))$ . To rewrite this equation, we need to isolate the variable y. We can start by distributing the negative fraction to the terms inside the parentheses.

y - 2 = -\frac{2}{3}x - \frac{2}{3}(-1)

Next, we can simplify the equation by evaluating the expression inside the parentheses.

y - 2 = -\frac{2}{3}x + \frac{2}{3}

Now, we can add 2 to both sides of the equation to isolate the variable y.

y = -\frac{2}{3}x + \frac{2}{3} + 2

Simplifying the equation further, we get:

y = -\frac{2}{3}x + \frac{8}{3}

Identifying a Point on the Graph

Now that we have rewritten the equation, we can identify a point on the graph. To do this, we need to find the value of x that corresponds to a specific value of y. Let's say we want to find the point where x = 3.

y = -\frac{2}{3}(3) + \frac{8}{3}

Simplifying the equation, we get:

y = -2 + \frac{8}{3}

Converting the fraction to a decimal, we get:

y = -2 + 2.67

Evaluating the expression, we get:

y = 0.67

Therefore, the point on the graph is (3, 0.67).

Conclusion

In this article, we rewrote the equation $y - 2 = -\frac{2}{3}(x - (-1))$ to identify a point on the graph. We started by distributing the negative fraction to the terms inside the parentheses and then simplified the equation by evaluating the expression inside the parentheses. We then added 2 to both sides of the equation to isolate the variable y. Finally, we identified a point on the graph by finding the value of x that corresponds to a specific value of y. The point on the graph is (3, 0.67).

Key Takeaways

To rewrite an equation, we need to isolate the variable y.
We can distribute the negative fraction to the terms inside the parentheses to simplify the equation.
We can add or subtract the same value from both sides of the equation to isolate the variable y.
We can identify a point on the graph by finding the value of x that corresponds to a specific value of y.

Introduction

In our previous article, we rewrote the equation $y - 2 = -\frac{2}{3}(x - (-1))$ to identify a point on the graph. We received many questions from readers who wanted to learn more about rewriting equations and identifying points on graphs. In this article, we will answer some of the most frequently asked questions.

Q: What is the purpose of rewriting an equation?

A: The purpose of rewriting an equation is to isolate the variable y and make it easier to identify key points on the graph. By rewriting the equation, we can simplify the expression and make it more manageable.

Q: How do I distribute the negative fraction to the terms inside the parentheses?

A: To distribute the negative fraction, you need to multiply the fraction by each term inside the parentheses. For example, if you have the equation $y - 2 = -\frac{2}{3}(x - (-1))$ , you would multiply the fraction by each term inside the parentheses: $y - 2 = -\frac{2}{3}x + \frac{2}{3}$ .

Q: How do I add or subtract the same value from both sides of the equation?

A: To add or subtract the same value from both sides of the equation, you need to perform the operation on both sides of the equation. For example, if you have the equation $y - 2 = -\frac{2}{3}x + \frac{2}{3}$ , you can add 2 to both sides of the equation to get $y = -\frac{2}{3}x + \frac{8}{3}$ .

Q: How do I identify a point on the graph?

A: To identify a point on the graph, you need to find the value of x that corresponds to a specific value of y. You can do this by substituting the value of x into the equation and solving for y. For example, if you want to find the point where x = 3, you would substitute x = 3 into the equation $y = -\frac{2}{3}x + \frac{8}{3}$ and solve for y.

Q: What if I get stuck while rewriting the equation?

A: If you get stuck while rewriting the equation, don't worry! You can try breaking down the equation into smaller steps or seeking help from a teacher or tutor. You can also try using online resources such as Khan Academy, Mathway, or Wolfram Alpha to get help with rewriting equations.

Q: Can I use this method to rewrite any equation?

A: Yes, you can use this method to rewrite any equation that has a variable y. However, you may need to adjust the method depending on the specific equation you are working with. For example, if the equation has a fraction or a decimal, you may need to use a different method to rewrite it.

Q: What are some common mistakes to avoid when rewriting equations?

A: Some common mistakes to avoid when rewriting equations include:

Not distributing the negative fraction to the terms inside the parentheses
Not adding or subtracting the same value from both sides of the equation
Not simplifying the expression
Not identifying the correct value of x that corresponds to a specific value of y

Conclusion

In this article, we answered some of the most frequently asked questions about rewriting equations and identifying points on graphs. We hope that this article has been helpful in clarifying any confusion and providing additional guidance on how to rewrite equations and identify points on graphs.

Key Takeaways

Rewriting an equation is an important step in identifying key points on the graph.
Distributing the negative fraction to the terms inside the parentheses is an important step in rewriting the equation.
Adding or subtracting the same value from both sides of the equation is an important step in rewriting the equation.
Identifying the correct value of x that corresponds to a specific value of y is an important step in identifying points on the graph.