Math Problem Statement

Write the equation of the line that passes through the points left parenthesis, 3, comma, 0, right parenthesis(3,0) and left parenthesis, 8, comma, minus, 2, right parenthesis(8,−2). Put your answer in fully simplified point-slope form, unless it is a vertical or horizontal line.

Answer

Attempt 1 out of 2

Solution

To find the equation of the line that passes through the points (3,0)(3, 0) and (8,2)(8, -2), we follow these steps:

1. Find the slope (mm):

The formula for the slope between two points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) is:

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

Substituting the given points (3,0)(3, 0) and (8,2)(8, -2):

m=2083=25m = \frac{-2 - 0}{8 - 3} = \frac{-2}{5}

Thus, the slope is:

m=25m = -\frac{2}{5}

2. Use the point-slope form:

The point-slope form of a line is:

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

We can use either of the given points. Using (3,0)(3, 0):

y0=25(x3)y - 0 = -\frac{2}{5}(x - 3)

This simplifies to:

y=25(x3)y = -\frac{2}{5}(x - 3)

3. Fully simplified point-slope form:

The final equation is:

y=25(x3)y = -\frac{2}{5}(x - 3)

Would you like further details or have any questions about this process?


Related Questions:

  1. How would the equation change if written in slope-intercept form?
  2. What is the significance of the slope in the context of this line?
  3. Could this line be written in standard form? If so, how?
  4. How do you graph a line using the point-slope form?
  5. What happens to the slope if the points are reversed?

Tip:

When using the point-slope form, always double-check the slope calculation to ensure precision.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope
Point-Slope 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