Math Problem Statement

What is the equation in point-slope form of the line that passes through the point (-2, 4) and has a slope of 3?

Solution

To solve the given problem, let's use the point-slope form equation of a line, which is given by:

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

Where:

  • mm is the slope of the line
  • (x1,y1)(x_1, y_1) is the given point through which the line passes.

Step-by-Step Solution:

  1. Substitute the slope and point into the equation:

    • Slope (mm) = 3
    • Point (x1,y1x_1, y_1) = (-2, 4)

    Substituting into yy1=m(xx1)y - y_1 = m(x - x_1):

    y4=3(x(2))y - 4 = 3(x - (-2))

  2. Simplify the equation:

    • x(2)x - (-2) becomes x+2x + 2

    So the equation becomes:

    y4=3(x+2)y - 4 = 3(x + 2)

Match with the Options:

From the options, the correct answer is C: y4=3(x+2)y - 4 = 3(x + 2).


Would you like me to elaborate further on any step?

Related Questions:

  1. How do you convert the point-slope form to slope-intercept form?
  2. Can you explain the process of finding the equation of a line given two points?
  3. What happens if the slope is zero or undefined?
  4. How can you check if a given point lies on the line described by an equation?
  5. What are the differences between point-slope form, slope-intercept form, and standard form?

Tip:

Always double-check the sign of the given point when substituting into the point-slope formula!

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Math Problem Analysis

Mathematical Concepts

Algebra
Point-Slope Form
Linear Equations

Formulas

Point-slope form: y - y1 = m(x - x1)

Theorems

Linear equation theory

Suitable Grade Level

Grades 8-10