Math Problem Statement

Find the equation of the line passing through the points (-6, 6) and (-3, 5) shown in the graph.

Solution

The graph shows a linear function passing through the points (6,6)(-6, 6) and (3,5)(-3, 5). I will calculate the equation of the line based on these points.

Step 1: Find the slope (mm) of the line

The slope formula is: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Substitute the given points (6,6)(-6, 6) and (3,5)(-3, 5): m=563(6)=13+6=13m = \frac{5 - 6}{-3 - (-6)} = \frac{-1}{-3 + 6} = \frac{-1}{3}

The slope of the line is: m=13m = -\frac{1}{3}

Step 2: Use the point-slope form to find the equation

The point-slope form of a linear equation is: yy1=m(xx1)y - y_1 = m(x - x_1) Using the point (6,6)(-6, 6) and the slope m=13m = -\frac{1}{3}, substitute into the equation: y6=13(x(6))y - 6 = -\frac{1}{3}(x - (-6)) Simplify: y6=13(x+6)y - 6 = -\frac{1}{3}(x + 6) y6=13x2y - 6 = -\frac{1}{3}x - 2 y=13x+4y = -\frac{1}{3}x + 4

Final Equation

The equation of the line is: y=13x+4y = -\frac{1}{3}x + 4

Would you like further details about the process or additional explanations?

Here are 5 related questions:

  1. What is the y-intercept of this line and how is it interpreted?
  2. How would the graph change if the slope was positive instead of negative?
  3. Can you determine the x-intercept of the line from its equation?
  4. How do we rewrite this equation in standard form (Ax+By=CAx + By = C)?
  5. What happens to the equation if the line passes through the origin?

Tip: The slope tells you how much yy changes for every unit increase in xx. Understanding this helps interpret linear relationships in data.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

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

Theorems

Linear Equation

Suitable Grade Level

Grades 8-10