Math Problem Statement

Which of the following points does not lie on the line y = 3x − 2?

A

(0, −2)

B

(1, 1)

C

(−1, 5)

D

(2, 4)

Solution

To determine which point does not lie on the line y=3x2y = 3x - 2, we substitute the xx- and yy-values of each point into the equation and check if the equation holds true.


Testing each point:

  1. Point A: (0,2)(0, -2)
    Substituting x=0x = 0 into y=3x2y = 3x - 2:
    y=3(0)2=2y = 3(0) - 2 = -2
    The yy-value matches (y=2y = -2), so (0,2)(0, -2) lies on the line.

  2. Point B: (1,1)(1, 1)
    Substituting x=1x = 1 into y=3x2y = 3x - 2:
    y=3(1)2=1y = 3(1) - 2 = 1
    The yy-value matches (y=1y = 1), so (1,1)(1, 1) lies on the line.

  3. Point C: (1,5)(-1, 5)
    Substituting x=1x = -1 into y=3x2y = 3x - 2:
    y=3(1)2=32=5y = 3(-1) - 2 = -3 - 2 = -5
    The yy-value does not match (y=5y = 5), so (1,5)(-1, 5) does not lie on the line.

  4. Point D: (2,4)(2, 4)
    Substituting x=2x = 2 into y=3x2y = 3x - 2:
    y=3(2)2=62=4y = 3(2) - 2 = 6 - 2 = 4
    The yy-value matches (y=4y = 4), so (2,4)(2, 4) lies on the line.


Conclusion:

The point that does not lie on the line is C: (1,5)(-1, 5).


Do you want further details or have any questions?

Here are 5 related questions to explore further:

  1. How do you derive the equation of a line from two given points?
  2. What is the slope-intercept form of a linear equation, and what do its components represent?
  3. How can you determine if a point lies on a line without graphing?
  4. What is the geometric interpretation of a point not lying on a line?
  5. How do you find the distance from a point to a line?

Tip: To confirm points on a line quickly, always check the equation by substitution and verify both sides match.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Substitution
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope-Intercept Form Theorem

Suitable Grade Level

Grades 6-8