Chapter 1: Problem 31
Find the slope of the line \(3 x-5 y=-11\).
Short Answer
Expert verified
The slope of the line is \(\frac{3}{5}\).
Step by step solution
01
- Write the equation in slope-intercept form
The slope-intercept form of a line is given by \[y = mx + b\] First, rearrange the equation \(3x - 5y = -11\) to get \(y\) alone on one side of the equation.
02
- Isolate the y-term
To isolate the \(y\)-term, subtract \(3x\) from both sides of the equation: \[-5y = -3x - 11\]
03
- Solve for y
Divide both sides of the equation by \(-5\): \[y = \frac{-3x - 11}{-5}\] Which simplifies to: \[y = \frac{3}{5}x + \frac{11}{5}\]
04
- Identify the slope
In the slope-intercept form \(y = mx + b\), the coefficient of \(x\) is the slope \(m\). Therefore, the slope of the line \(3x - 5y = -11\) is: \(\frac{3}{5}\)
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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 way of writing the equation of a line so that you can easily identify the slope and the y-intercept. This form is given by the equation \( y = mx + b \). Here, \(m\) represents the slope of the line, and \( b \) is the y-intercept, which is where the line crosses the y-axis.
To convert any linear equation to the slope-intercept form, you'll want to solve for \(y\) so that it's isolated on one side of the equation. For example, consider the equation \( 3x - 5y = -11 \). The goal is to get it into the form \( y = mx + b \), which makes it easy to read off the slope and y-intercept directly.
If you can understand and manipulate the slope-intercept form, many aspects of graphing and analyzing linear equations become much simpler. It helps in quickly identifying how steep the line is and where it crosses the y-axis.
To convert any linear equation to the slope-intercept form, you'll want to solve for \(y\) so that it's isolated on one side of the equation. For example, consider the equation \( 3x - 5y = -11 \). The goal is to get it into the form \( y = mx + b \), which makes it easy to read off the slope and y-intercept directly.
If you can understand and manipulate the slope-intercept form, many aspects of graphing and analyzing linear equations become much simpler. It helps in quickly identifying how steep the line is and where it crosses the y-axis.
linear equations
Linear equations are equations that produce straight lines when graphed. They typically have one or two variables with no exponents or powers beyond one. A simple example is \(2x + 3y = 6\). Linear equations can represent relationships in which one variable changes at a constant rate relative to another.
The general form of a linear equation in two variables is \( Ax + By = C \), where \(A\), \(B\), and \(C \) are constants. When working with linear equations, it's common to transform them into the slope-intercept form to make them easier to graph and understand.
Transforming a linear equation from its standard form to the slope-intercept form can make it very intuitive to comprehend its graph and the behavior of its solutions. It shows you directly how y changes as x changes, which is crucial for solving many algebra problems.
The general form of a linear equation in two variables is \( Ax + By = C \), where \(A\), \(B\), and \(C \) are constants. When working with linear equations, it's common to transform them into the slope-intercept form to make them easier to graph and understand.
Transforming a linear equation from its standard form to the slope-intercept form can make it very intuitive to comprehend its graph and the behavior of its solutions. It shows you directly how y changes as x changes, which is crucial for solving many algebra problems.
solving for y
Solving for \(y\) means isolating \( y \) on one side of the equation so that you can easily identify the relationship between \(y\) and the other variable(s). This often involves a few algebraic steps.
Take the equation \(3x - 5y = -11\). The goal here is to get \(y\) by itself on one side of the equation. Start by subtracting \(3x\) from both sides: \(-5y = -3x - 11\). Next, divide every term by \(-5\) to isolate \(y\): \( y = \frac{3}{5}x + \frac{11}{5} \).
Now, the equation \( y = \frac{3}{5}x + \frac{11}{5} \) is in the slope-intercept form. This makes it clear that the slope \(m\) is \(\frac{3}{5}\) and the y-intercept \(b\) is \(\frac{11}{5}\). Solving for \(y\) simplifies many problems and helps in graphing and understanding the equation thoroughly.
Take the equation \(3x - 5y = -11\). The goal here is to get \(y\) by itself on one side of the equation. Start by subtracting \(3x\) from both sides: \(-5y = -3x - 11\). Next, divide every term by \(-5\) to isolate \(y\): \( y = \frac{3}{5}x + \frac{11}{5} \).
Now, the equation \( y = \frac{3}{5}x + \frac{11}{5} \) is in the slope-intercept form. This makes it clear that the slope \(m\) is \(\frac{3}{5}\) and the y-intercept \(b\) is \(\frac{11}{5}\). Solving for \(y\) simplifies many problems and helps in graphing and understanding the equation thoroughly.