Math Problem Statement

Find the equation for the line that passes through the points (-5, -8) and (-1, -6). Give your answer in point-slope form.

Solution

The problem asks for the equation of the line passing through the points (5,8)(-5, -8) and (1,6)(-1, -6) in point-slope form.

Steps:

  1. Find the slope: The slope mm between two points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) is given by: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Substituting (5,8)(-5, -8) as (x1,y1)(x_1, y_1) and (1,6)(-1, -6) as (x2,y2)(x_2, y_2): m=6(8)1(5)=6+81+5=24=12m = \frac{-6 - (-8)}{-1 - (-5)} = \frac{-6 + 8}{-1 + 5} = \frac{2}{4} = \frac{1}{2}

  2. Use point-slope form: The point-slope form of a line is: yy1=m(xx1)y - y_1 = m(x - x_1) Using the slope m=12m = \frac{1}{2} and one of the points, say (5,8)(-5, -8): y(8)=12(x(5))y - (-8) = \frac{1}{2}(x - (-5)) Simplifying: y+8=12(x+5)y + 8 = \frac{1}{2}(x + 5)

Final equation in point-slope form:

y+8=12(x+5)y + 8 = \frac{1}{2}(x + 5)

You do not need to simplify further.


Would you like further clarification or additional details? Here are some related questions you might find interesting:

  1. How do you convert point-slope form to slope-intercept form?
  2. What are the other forms of a linear equation?
  3. Can you derive the equation of the line using a different point from the pair?
  4. How would you find the equation of the line if you were given a slope and one point?
  5. How does the point-slope form compare to the general form of a line?

Tip: Always double-check the slope calculation to ensure accuracy when working with two points.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations

Formulas

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

Theorems

Slope formula
Point-slope form theorem

Suitable Grade Level

Grades 8-10