Question

Find the \(x\)-intercept and the \(y\)-intercept of the graph of the equation. \(y=x\)

Short answer

The x-intercept and y-intercept for the equation \(y=x\) are both 0.

Step-by-step solution

Find the x-intercept

Set \(y\) to zero and solve for \(x\) in the equation \(y = x\). When \(y = 0, x = 0\) so the x-intercept is 0.

Find the y-intercept

Set \(x\) to zero and solve for \(y\) in the equation \(y = x\). When \(x = 0, y = 0\) so the y-intercept is 0.

Key concepts

Understanding x-intercept

The concept of an \(x\)-intercept is an important component when analyzing graphs. The \(x\)-intercept is the point where a line or curve crosses the \(x\)-axis. To find this point, we need to identify the value of \(x\) when \(y\) equals zero. This is because any point on the \(x\)-axis has a \(y\)-coordinate of 0.

Here's how you can find the \(x\)-intercept in a linear equation like \(y = x\):

• Set \(y = 0\)
• Solve the equation for \(x\)

In our situation, when we plug \(y = 0\) into the equation \(y = x\), we simply have \(0 = x\). Therefore, the \(x\)-intercept is at the point \((0, 0)\).

This implies that the line passes through the origin, which is a common situation for basic linear equations. Recognizing \(x\)-intercepts helps in plotting graphs and understanding their behavior across different points.

Exploring y-intercept

The \(y\)-intercept of a graph is another fundamental aspect to understand. It is the point where the line or graph crosses the \(y\)-axis. Here, we'll consider the value of \(y\) when \(x\) is zero, as every point on the \(y\)-axis has an \(x\)-coordinate of 0.

To find the \(y\)-intercept in the equation \(y = x\), you should:

• Set \(x = 0\)
• Solve the equation for \(y\)

Substituting \(x = 0\) into \(y = x\) means \(y = 0\).

Thus, the \(y\)-intercept is also \((0, 0)\). This indicates the same crossing point as the \(x\)-intercept for our equation, which means the line intersects at the origin. The \(y\)-intercept is crucial for graphing as it gives a specific starting point for the line on a graph.

Linear Equations Basics

Linear equations are foundational in algebra and provide a straight line graph. Their general form is \(y = mx + b\), where \(m\) represents the slope and \(b\) the \(y\)-intercept. In the simplest form of a linear equation, like \(y = x\), both the \(x\)-intercept and \(y\)-intercept are at the origin, as seen in the given exercise.

Characteristics of linear equations include:

• They graph as a straight line.
• Their solutions can be found using basic algebraic techniques.
• The slope \(m\) indicates the tilt or steepness of the line.

The simple equation \(y = x\) means the slope \(m = 1\), making a 45-degree line with respect to both axes, assuming equal scales.

Understanding linear equations is crucial in solving real-world problems involving constant rates. They form the basis for more complex math concepts, so mastering them ensures a smoother mathematical journey ahead.