Math Problem Statement

Write the equation of the line that passes through the points left parenthesis, minus, 3, comma, minus, 8, right parenthesis(−3,−8)and left parenthesis, minus, 9, comma, 9, right parenthesis(−9,9). Put your answer in fully simplified point-slope form,

Solution

To find the equation of the line passing through the points (3,8)(-3, -8) and (9,9)(-9, 9) in point-slope form, we’ll follow these steps:

  1. Calculate the slope (m)(m) using the formula:

    m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

    Here, (x1,y1)=(3,8)(x_1, y_1) = (-3, -8) and (x2,y2)=(9,9)(x_2, y_2) = (-9, 9).

    m=9(8)9(3)=9+89+3=176=176m = \frac{9 - (-8)}{-9 - (-3)} = \frac{9 + 8}{-9 + 3} = \frac{17}{-6} = -\frac{17}{6}

  2. Use the point-slope form of the line equation:

    yy1=m(xx1)y - y_1 = m(x - x_1)

    Choosing the point (3,8)(-3, -8), we substitute m=176m = -\frac{17}{6}, x1=3x_1 = -3, and y1=8y_1 = -8:

    y(8)=176(x(3))y - (-8) = -\frac{17}{6}(x - (-3))

    Simplify this to:

    y+8=176(x+3)y + 8 = -\frac{17}{6}(x + 3)

So, the equation of the line in point-slope form is:

y+8=176(x+3)y + 8 = -\frac{17}{6}(x + 3)

Would you like further explanation or details?


Related Questions

  1. How do you convert a point-slope form equation to slope-intercept form?
  2. What is the significance of the slope in a line equation?
  3. How can you verify if a point lies on a given line?
  4. How do you find the midpoint between two points?
  5. What are alternative forms of linear equations?

Tip

When using point-slope form, you can choose either of the two given points for x1x_1 and y1y_1; both will give the same line equation.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

Point-slope form theorem

Suitable Grade Level

Grades 8-10