Math Problem Statement

Write an equation for a line passing through the points (-5,-6) and (1,3)

Solution

To find the equation of a line passing through two points, we can use the point-slope form of the line equation, which is:

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

Where:

  • (x1,y1)(x_1, y_1) is one of the points on the line.
  • mm is the slope of the line, calculated by:

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

Given the points (5,6)(-5, -6) and (1,3)(1, 3):

  1. Calculate the slope mm:

m=3(6)1(5)=3+61+5=96=32m = \frac{3 - (-6)}{1 - (-5)} = \frac{3 + 6}{1 + 5} = \frac{9}{6} = \frac{3}{2}

  1. Now, use the point-slope form with the slope m=32m = \frac{3}{2} and one of the points, say (1,3)(1, 3):

y3=32(x1)y - 3 = \frac{3}{2}(x - 1)

  1. To express this in slope-intercept form y=mx+by = mx + b:

Expand and simplify:

y3=32x32y - 3 = \frac{3}{2}x - \frac{3}{2}

y=32x32+3y = \frac{3}{2}x - \frac{3}{2} + 3

y=32x+32y = \frac{3}{2}x + \frac{3}{2}

So, the equation of the line is:

y=32x+32y = \frac{3}{2}x + \frac{3}{2}

Would you like more details or have any questions?

Here are 5 related questions:

  1. How do you find the slope of a line if given two points?
  2. What is the point-slope form of a line?
  3. How can you convert the point-slope form to slope-intercept form?
  4. What is the significance of the y-intercept in the slope-intercept form?
  5. Can you find the equation of a line parallel to the given line that passes through a different point?

Tip: Always check your slope calculation first, as it determines the accuracy of the line equation.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Linear Equations

Formulas

Point-slope form
Slope calculation

Theorems

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Suitable Grade Level

Grades 8-10