Math Problem Statement

(-1,6) (2,0) equation

Solution

To find the equation of a line passing through the points (1,6)(-1,6) and (2,0)(2,0), we use the slope-intercept form of a line equation:

y=mx+by = mx + b

Step 1: Find the slope (mm)

The slope mm is calculated using the formula: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

Substitute the coordinates: m=062(1)=62+1=63=2m = \frac{0 - 6}{2 - (-1)} = \frac{-6}{2 + 1} = \frac{-6}{3} = -2

Step 2: Use the point-slope formula

The point-slope formula is: yy1=m(xx1)y - y_1 = m(x - x_1) Using the slope m=2m = -2 and one of the points, say (1,6)(-1,6): y6=2(x(1))y - 6 = -2(x - (-1)) Simplify: y6=2(x+1)y - 6 = -2(x + 1) y6=2x2y - 6 = -2x - 2 y=2x+4y = -2x + 4

Final Equation

The equation of the line is: y=2x+4y = -2x + 4

Verification

To confirm, substitute the other point (2,0)(2,0) into the equation: y=2(2)+4=4+4=0y = -2(2) + 4 = -4 + 4 = 0 This verifies that the equation is correct.

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Related Questions

  1. How do you determine the slope between any two points?
  2. What is the process for converting point-slope form to slope-intercept form?
  3. How would the equation change if the points were (1,6)(-1,6) and (2,1)(2,1)?
  4. Can you find the perpendicular line passing through one of these points?
  5. What is the significance of the slope in real-world applications?

Tip: Always double-check calculations when dealing with signs (e.g., negative and positive) in slope formulas!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form
Point-Slope Form

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Point-slope formula: y - y1 = m(x - x1)
Slope-intercept form: y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10