Math Problem Statement

What is an equation of the line that passes through the point (4,-4) and is parallel to the line 3x - 4y = 16?

Solution

To find the equation of the line that passes through the point (4,4)(4, -4) and is parallel to the line given by 3x4y=163x - 4y = 16, follow these steps:

Step 1: Find the slope of the given line

The general form of a line is Ax+By=CAx + By = C. To find the slope, we first convert the given line equation 3x4y=163x - 4y = 16 into the slope-intercept form y=mx+by = mx + b, where mm represents the slope.

Starting with: 3x4y=163x - 4y = 16

Solve for yy: 4y=3x+16-4y = -3x + 16 y=34x4y = \frac{3}{4}x - 4

So, the slope of the given line is m=34m = \frac{3}{4}.

Step 2: Use the point-slope form

Since the new line is parallel, it will have the same slope m=34m = \frac{3}{4}. Now, using the point-slope form of the equation of a line:

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

where (x1,y1)(x_1, y_1) is the given point (4,4)(4, -4) and m=34m = \frac{3}{4}.

Substitute the values: y(4)=34(x4)y - (-4) = \frac{3}{4}(x - 4) y+4=34(x4)y + 4 = \frac{3}{4}(x - 4)

Step 3: Simplify the equation

Distribute 34\frac{3}{4}: y+4=34x3y + 4 = \frac{3}{4}x - 3

Subtract 4 from both sides: y=34x34y = \frac{3}{4}x - 3 - 4 y=34x7y = \frac{3}{4}x - 7

Final Answer:

The equation of the line that passes through the point (4,4)(4, -4) and is parallel to the line 3x4y=163x - 4y = 16 is: y=34x7y = \frac{3}{4}x - 7

Would you like a detailed explanation of any of the steps?


Here are 5 related questions:

  1. How do you find the equation of a line given two points?
  2. What is the slope of a line perpendicular to a given slope?
  3. How do you convert a line from standard form to slope-intercept form?
  4. What is the point-slope form of a line, and how is it used?
  5. How would the equation change if the line passed through a different point?

Tip: Parallel lines always have the same slope but different yy-intercepts.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Parallel Lines
Slope-Intercept Form
Point-Slope Form

Formulas

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

Theorems

Parallel Lines Theorem (parallel lines have the same slope)

Suitable Grade Level

Grades 8-10