Substituting the Given Point and Slope

Oct 13, 2025 by wbrum.org 27 views

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Introduction

In mathematics, the equation of a line can be determined using various methods, including the slope-intercept form, point-slope form, and standard form. In this article, we will focus on finding the equation of a line that passes through a given point and has a specified slope. We will use the point-slope form of a linear equation, which is given by:

y - y1 = m(x - x1)

where (x1, y1) is the given point and m is the slope of the line.

The Point-Slope Form of a Linear Equation

The point-slope form of a linear equation is a powerful tool for finding the equation of a line that passes through a given point and has a specified slope. This form is given by:

y - y1 = m(x - x1)

where (x1, y1) is the given point and m is the slope of the line.

To use this form, we need to substitute the given point and slope into the equation. Let's consider the given problem:

Find the equation of the line passing through the point (-6, 5) with slope m = 5.

Substituting the Given Point and Slope

We will substitute the given point (-6, 5) and slope m = 5 into the point-slope form of a linear equation:

y - 5 = 5(x - (-6))

Simplifying the equation, we get:

y - 5 = 5(x + 6)

Simplifying the Equation

To simplify the equation, we will expand the right-hand side and combine like terms:

y - 5 = 5x + 30

Adding 5 to both sides of the equation, we get:

y = 5x + 35

Checking the Answer Choices

Now that we have found the equation of the line, let's check the answer choices:

A. y = 5x - 31 B. y = 5x + 35 C. y = (1/5)x - (31/5) D. y = (1/5)x + 7

Only answer choice B matches our solution.

Conclusion

In this article, we used the point-slope form of a linear equation to find the equation of a line that passes through a given point and has a specified slope. We substituted the given point and slope into the equation and simplified it to get the final answer. We also checked the answer choices to ensure that our solution was correct.

Frequently Asked Questions

Q: What is the point-slope form of a linear equation?

A: The point-slope form of a linear equation is given by:

y - y1 = m(x - x1)

where (x1, y1) is the given point and m is the slope of the line.

Q: How do I find the equation of a line that passes through a given point and has a specified slope?

A: To find the equation of a line that passes through a given point and has a specified slope, you can use the point-slope form of a linear equation. Substitute the given point and slope into the equation and simplify it to get the final answer.

Q: What is the slope-intercept form of a linear equation?

A: The slope-intercept form of a linear equation is given by:

y = mx + b

where m is the slope of the line and b is the y-intercept.

Q: How do I convert the point-slope form of a linear equation to the slope-intercept form?

A: To convert the point-slope form of a linear equation to the slope-intercept form, you can add y1 to both sides of the equation and simplify it to get the final answer.

References

[1] "Linear Equations" by Math Open Reference. Retrieved February 26, 2024.
[2] "Point-Slope Form" by Purplemath. Retrieved February 26, 2024.
[3] "Slope-Intercept Form" by Mathway. Retrieved February 26, 2024.

Additional Resources

[1] "Linear Equations" by Khan Academy. Retrieved February 26, 2024.
[2] "Point-Slope Form" by IXL. Retrieved February 26, 2024.
[3] "Slope-Intercept Form" by CK-12. Retrieved February 26, 2024.

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Introduction

In our previous article, we discussed how to find the equation of a line that passes through a given point and has a specified slope using the point-slope form of a linear equation. In this article, we will provide a Q&A section to help you better understand the concept and address any questions you may have.

Q&A

Q: What is the point-slope form of a linear equation?

A: The point-slope form of a linear equation is given by:

y - y1 = m(x - x1)

where (x1, y1) is the given point and m is the slope of the line.

Q: How do I find the equation of a line that passes through a given point and has a specified slope?

Q: What is the slope-intercept form of a linear equation?

A: The slope-intercept form of a linear equation is given by:

y = mx + b

where m is the slope of the line and b is the y-intercept.

Q: How do I convert the point-slope form of a linear equation to the slope-intercept form?

A: To convert the point-slope form of a linear equation to the slope-intercept form, you can add y1 to both sides of the equation and simplify it to get the final answer.

Q: What is the difference between the point-slope form and the slope-intercept form of a linear equation?

A: The point-slope form of a linear equation is used when you know the slope and a point on the line, while the slope-intercept form is used when you know the slope and the y-intercept.

Q: How do I find the slope of a line given two points?

A: To find the slope of a line given two points, you can use the formula:

m = (y2 - y1) / (x2 - x1)

where (x1, y1) and (x2, y2) are the two points.

Q: What is the equation of a line that passes through the point (2, 3) and has a slope of 4?

A: To find the equation of a line that passes through the point (2, 3) and has a slope of 4, you can use the point-slope form of a linear equation:

y - 3 = 4(x - 2)

Simplifying the equation, you get:

y - 3 = 4x - 8

Adding 3 to both sides of the equation, you get:

y = 4x - 5

Q: What is the equation of a line that passes through the point (-1, 2) and has a slope of -3?

A: To find the equation of a line that passes through the point (-1, 2) and has a slope of -3, you can use the point-slope form of a linear equation:

y - 2 = -3(x - (-1))

Simplifying the equation, you get:

y - 2 = -3(x + 1)

Adding 2 to both sides of the equation, you get:

y = -3x - 1

Conclusion

In this article, we provided a Q&A section to help you better understand the concept of finding the equation of a line that passes through a given point and has a specified slope. We hope that this article has been helpful in addressing any questions you may have had.

Frequently Asked Questions

Q: What is the point-slope form of a linear equation?

A: The point-slope form of a linear equation is given by:

y - y1 = m(x - x1)

where (x1, y1) is the given point and m is the slope of the line.

Q: How do I find the equation of a line that passes through a given point and has a specified slope?

Q: What is the slope-intercept form of a linear equation?

A: The slope-intercept form of a linear equation is given by:

y = mx + b

where m is the slope of the line and b is the y-intercept.

References

[1] "Linear Equations" by Math Open Reference. Retrieved February 26, 2024.
[2] "Point-Slope Form" by Purplemath. Retrieved February 26, 2024.
[3] "Slope-Intercept Form" by Mathway. Retrieved February 26, 2024.

Additional Resources

[1] "Linear Equations" by Khan Academy. Retrieved February 26, 2024.
[2] "Point-Slope Form" by IXL. Retrieved February 26, 2024.
[3] "Slope-Intercept Form" by CK-12. Retrieved February 26, 2024.