Math Problem Statement

Find the equation of the line with slope 2 that goes through the point (−4, −3).

Solution

To find the equation of a line with slope m=2m = 2 that passes through the point (4,3)(-4, -3), we use the point-slope form of a linear equation:

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

where (x1,y1)(x_1, y_1) is a given point on the line, and mm is the slope.

Substituting the given values:

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

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

y+3=2x+8y + 3 = 2x + 8

y=2x+5y = 2x + 5

Final Answer:

y=2x+5y = 2x + 5

This is the slope-intercept form of the equation of the line.


Would you like a step-by-step explanation or an alternative form of the equation?

Here are five related questions for further practice:

  1. Find the equation of the line with slope 3-3 that passes through (2,5)(2, 5).
  2. Find the equation of the line passing through points (1,2)(1,2) and (3,6)(3,6).
  3. Convert the equation 3x2y=63x - 2y = 6 to slope-intercept form.
  4. Determine the slope of the line perpendicular to y=12x4y = \frac{1}{2}x - 4.
  5. Find the x-intercept and y-intercept of the line y=23x+4y = -\frac{2}{3}x + 4.

Tip:

A line parallel to y=mx+by = mx + b has the same slope mm, while a perpendicular line has a slope of 1m-\frac{1}{m}.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Point-Slope Form
Slope-Intercept Form

Formulas

Point-Slope Form: y - y1 = m(x - x1)
Slope-Intercept Form: y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10