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Find the \(x\) -intercept and the \(y\) -intercept for the graph of each equation. $$ -3 x+2 y=12 $$

Short Answer

Expert verified
The x-intercept is -4, and the y-intercept is 6.

Step by step solution

01

Identify the x-intercept

To find the x-intercept, set y to 0 and solve for x. Substitute y = 0 into the equation \(-3x + 2(0) = 12\)
02

Solve the equation for the x-intercept

Simplify the equation: \(-3x = 12\). Divide both sides by -3: \(x = -4\)
03

Identify the y-intercept

To find the y-intercept, set x to 0 and solve for y. Substitute x = 0 into the equation \(-3(0) + 2y = 12\)
04

Solve the equation for the y-intercept

Simplify the equation: \(2y = 12\). Divide both sides by 2: \(y = 6\)
05

Interpreting the intercepts

The x-intercept is the point on the graph where it crosses the x-axis, which is (-4, 0). The y-intercept is the point on the graph where it crosses the y-axis, which is (0, 6).

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Key Concepts

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

Finding x-intercept
The x-intercept of a graph is the point where the graph crosses the x-axis. At this point, the value of y is always 0.

To find the x-intercept for a given equation, follow these steps:
  • Set y to 0 in the equation
  • Solve for x

Let's apply these steps to the equation \(-3x + 2y = 12\).

First, set y to 0:
\(-3x + 2(0) = 12\).

Now, simplify and solve for x:
\-3x = 12\
\ x = -4\

So, the x-intercept is \(-4, 0\).
Finding y-intercept
The y-intercept of a graph is the point where the graph crosses the y-axis. At this point, the value of x is always 0.

To find the y-intercept for a given equation, follow these steps:
  • Set x to 0 in the equation
  • Solve for y

Let's apply these steps to the equation \(-3x + 2y = 12\).

First, set x to 0:
\(-3(0) + 2y = 12\).

Now, simplify and solve for y:
\2y = 12\
\ y = 6\

So, the y-intercept is \(0, 6\).
Solving linear equations
Solving linear equations involves finding the value of the variables that make the equation true. In a standard form linear equation \(Ax + By = C\), you can solve for one variable by isolating it on one side of the equation.

Here’s a step-by-step approach:
  • Identify the variable you need to solve for
  • Isolate the variable by performing the same operation on both sides of the equation
  • Simplify the equation to solve for the variable

Using the equation \(-3x + 2y = 12\) as an example, we already solved for the intercepts by isolating x and y.

When solving for x (finding the x-intercept):
Set y to 0 and solve:
\ -3x = 12\
\ x = -4\

When solving for y (finding the y-intercept):
Set x to 0 and solve:
\ 2y = 12\
\ y = 6\

Understanding how to manipulate and simplify these equations is crucial for finding intercepts and solving various algebraic problems.

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