Math Problem Statement

The line L passes through the points (-8, -1) and (2, -12). Identify a vector V that moves points along L.

Solution

To find a vector V\mathbf{V} that moves points along the line LL, which passes through the points (8,1)(-8, -1) and (2,12)(2, -12), we can use the difference between these two points.

  1. Let the two points be: P1=(8,1)andP2=(2,12)P_1 = (-8, -1) \quad \text{and} \quad P_2 = (2, -12)

  2. The vector V\mathbf{V} that moves points along LL can be obtained by subtracting the coordinates of P1P_1 from P2P_2: V=P2P1=(2(8),12(1))\mathbf{V} = P_2 - P_1 = (2 - (-8), -12 - (-1))

  3. Simplifying the components: V=(2+8,12+1)=(10,11)\mathbf{V} = (2 + 8, -12 + 1) = (10, -11)

Therefore, the vector V=(10,11)\mathbf{V} = (10, -11) moves points along the line LL.

Would you like more details or have any questions?

Here are some related questions you might explore:

  1. How would you find the slope of line LL using points (8,1)(-8, -1) and (2,12)(2, -12)?
  2. What is the equation of line LL in slope-intercept form?
  3. How can you determine if another point lies on the line LL defined by (8,1)(-8, -1) and (2,12)(2, -12)?
  4. How can you use vector V\mathbf{V} to write a parametric equation for line LL?
  5. If LL were extended indefinitely, how could you represent its direction with a unit vector?

Tip: When finding a vector along a line passing through two points, subtract the coordinates of the initial point from the terminal point to obtain the direction vector.

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Math Problem Analysis

Mathematical Concepts

Vectors
Coordinate Geometry
Line Equations

Formulas

Vector between two points V = (x2 - x1, y2 - y1)

Theorems

None explicitly needed; basic vector subtraction

Suitable Grade Level

Grades 10-12