Math Problem Statement

Write an equation in slope-intercept form of the line that passes through the given point (-9, -2) and is parallel to the graph of the given equation y = -4x + 1.

Solution

Let's analyze the problem in your image. The task is to:

Write an equation in slope-intercept form of the line that passes through the given point (-9, -2) and is parallel to the graph of the given equation y=4x+1y = -4x + 1.

Solution:

  1. Find the slope of the given equation: The given equation is y=4x+1y = -4x + 1, which is already in slope-intercept form (y=mx+by = mx + b), where mm is the slope.

    • Here, m=4m = -4.

    Since the new line is parallel to this line, it will have the same slope: slope of new line =m=4.\text{slope of new line } = m = -4.

  2. Use the point-slope form: The point-slope form of a line is: yy1=m(xx1),y - y_1 = m(x - x_1), where mm is the slope, and (x1,y1)(x_1, y_1) is the given point.

    Substituting m=4m = -4, x1=9x_1 = -9, and y1=2y_1 = -2: y(2)=4(x(9)).y - (-2) = -4(x - (-9)). Simplify: y+2=4(x+9).y + 2 = -4(x + 9).

  3. Simplify to slope-intercept form: Distribute the slope (4-4) on the right-hand side: y+2=4x36.y + 2 = -4x - 36. Subtract 2 from both sides: y=4x38.y = -4x - 38.

Final Answer:

The equation of the line in slope-intercept form is: y=4x38.y = -4x - 38.


Would you like a deeper explanation or have any questions?

Here are some related questions for further exploration:

  1. How do you determine if two lines are parallel or perpendicular based on their slopes?
  2. Can you write the equation of a line that passes through a point and is perpendicular to a given line?
  3. What is the difference between point-slope form and slope-intercept form?
  4. How do you find the slope of a line given two points?
  5. Can you derive the equation of a line given its slope and the y-intercept directly?

Tip: Remember, parallel lines always have the same slope, but their y-intercepts will differ.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form
Point-Slope Form

Formulas

Slope-intercept form: y = mx + b
Point-slope form: y - y1 = m(x - x1)

Theorems

Parallel lines have the same slope

Suitable Grade Level

Grades 8-10