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Chapter 2: Problem 36

Find the slope of each line. $$ A x-B y=C $$

Short Answer

Expert verified
The slope of the line represented by the equation \( Ax - By = C \) is \( \frac{A}{B} \).

Step by step solution

01

Rewrite the equation in slope-intercept form

Start by isolating the variable y on one side of the equation to rewrite it in the form of y = mx + b, where m is the slope and b is the y-intercept.
02

Solve for y

Add By to both sides of the equation to get Ax = By + C and then divide each term by B to get y = \( \frac{A}{B} \)x + \( \frac{C}{B} \).
03

Identify the slope

Compare the equation with the slope-intercept form to identify that the slope of the line is \( \frac{A}{B} \).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Slope-Intercept Form
The slope-intercept form is a fundamental way to express a linear equation. It has the structure y = mx + b, where 'm' represents the slope and 'b' is the y-intercept. The slope defines how steep the line is, and the y-intercept is the point where the line crosses the y-axis.

Understanding this form is crucial as it makes analyzing and graphing linear equations much simpler. To find the slope of a line from an equation, your first task is to manipulate the equation until it matches this format. Once in slope-intercept form, you can directly read off the slope and y-intercept from the equation.
Isolating the Variable
Isolating the variable is a technique often used in algebra to solve for a particular variable. When dealing with linear equations, we typically want to isolate 'y' so that we can use the slope-intercept form of the equation. This involves using algebraic operations such as addition, subtraction, multiplication, and division to get the 'y' on one side of the equation by itself.

When isolating 'y', you may need to rearrange the equation, add or subtract terms on both sides, and divide or multiply through by a constant. This process simplifies the equation and is the stepping stone for finding the slope of a line.
Linear Equations
Linear equations form the basis of algebra and represent straight lines when graphed on a coordinate plane. They come in various formats, like the standard form Ax + By = C and the slope-intercept form y = mx + b. Being able to interconvert between these different forms is indispensable.

Every linear equation has a constant rate of change, which we call the slope. The solutions to these equations are ordered pairs (x, y) that lie on the line defined by the equation. Recognizing linear equations and understanding their properties opens the door to solving more complex algebraic problems.
Algebraic Manipulation
Algebraic manipulation involves rearranging and simplifying equations to solve for variables or to make the structure clearer. It includes a variety of operations like factoring, distributing, combining like terms, and using inverse operations. Mastering these skills is essential for solving algebraic equations efficiently.

When seeking the slope from an equation not in slope-intercept form, you apply algebraic manipulation to transform it. Each step must follow mathematical laws, ensuring that the equation remains balanced. This process is not only pivotal for finding slopes but also foundational for advancing in algebra and calculus.

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Most popular questions from this chapter

Which point(s) are solutions of the inequality \(5 x+3 y \geq 2 ?\) 1\. \((0,0)\) II. \((-1,0)\) and \(\left(0,-\frac{2}{3}\right)\) III \(\left(0, \frac{2}{3}\right)\) and \(\left(1,-\frac{2}{3}\right)\) A. I only B. \(|\) and \(\|\) C. III only D. II and III

Graph each absolute value equation. $$ y=|3 x-6|+1 $$

Find the slope of each line. $$ 3 x+y=1 $$

Graph each absolute value equation. $$ y=6-|3 x| $$

Graph each absolute value equation. $$ y=|2 x|-x $$
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