Math Problem Statement
write an equation given the points -5,-1 and -2,-8
Solution
To find the equation of the line that passes through the points and , we need to follow these steps:
Step 1: Find the slope (m)
The formula for the slope between two points and is:
Using the points and :
So, the slope .
Step 2: Use the point-slope form to write the equation
The point-slope form of the equation of a line is:
We can use either point, but let's use :
Simplifying this equation:
Distribute the slope:
Now, subtract 1 from both sides:
Convert 1 to a fraction:
Finally:
The equation of the line is:
Would you like more details, or do you have any questions about this process?
Here are five related questions to explore:
- How can you find the slope if the two points are vertically aligned?
- How would the equation change if the points were reversed?
- Can you rewrite the equation in standard form ?
- What happens to the slope if the two points are closer together?
- How can you verify if a third point lies on the same line?
Tip: When working with fractions in linear equations, always simplify terms before combining them for accuracy.
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Math Problem Analysis
Mathematical Concepts
Algebra
Linear Equations
Slope
Point-Slope Form
Formulas
Slope formula: m = (y2 - y1) / (x2 - x1)
Point-slope form: y - y1 = m(x - x1)
Theorems
Slope-Intercept Theorem
Suitable Grade Level
Grades 8-10
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