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\(41-48\) Find the \(x\) - and \(y\) -intercepts of the graph of the equation. $$ x y=5 $$

Short Answer

Expert verified
The equation \(xy = 5\) has no \(x\)- or \(y\)-intercepts.

Step by step solution

01

Identify the equation form

The given equation is \(xy = 5\). This represents a hyperbola when graphed on the coordinate plane.
02

Find the x-intercept

To find the \(x\)-intercept, set \(y = 0\) in the equation \(xy = 5\). Substitute \(y = 0\) into the equation: \(x \times 0 = 5\). If you solve this, it leads to an inconsistency (\(0 = 5\)), meaning there is no \(x\)-intercept for this equation. This makes sense since \(y = 0\) would require \(x\) to be infinite for the product to be \(5\).
03

Find the y-intercept

To find the \(y\)-intercept, set \(x = 0\) in the equation \(xy = 5\). Substitute \(x = 0\) into the equation: \(0 \times y = 5\). Similarly, this results in \(0 = 5\), an inconsistency, indicating that there is no \(y\)-intercept either, since \(x = 0\) would require \(y\) to be infinite to satisfy the equation.
04

Interpret the results

Since setting both potential intercepts lead to mathematical inconsistencies with infinite results, the graph of the equation \(xy = 5\) does not intersect the \(x\)-axis or the \(y\)-axis. Instead, the graph is a hyperbola situated in the first and third quadrants without crossing either axis.

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Key Concepts

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

Understanding the X-intercept
An x-intercept of a graph is the point where the graph crosses the x-axis. To find it, we set the y-value of the equation to zero and solve for x. When we apply this to the equation \(xy = 5\), we substitute y with 0, resulting in the equation \(x \times 0 = 5\). This simplifies to \(0 = 5\), which is a contradiction and has no solution.

Thus, this equation doesn't have an x-intercept. What this means graphically is that the hyperbola never touches the x-axis. The intercept is not only a root-finding exercise but also a way to understand behavior like this where the graph skews to infinite values rather than hitting the axis.
Identifying the Y-intercept
A y-intercept is where the graph crosses the y-axis, which involves setting the x-value to zero and solving the equation for y. Applying this to our equation \(xy = 5\) gives us \(0 \times y = 5\). Again, this leads to the inconsistency \(0 = 5\).

Therefore, the graph does not possess a y-intercept. The y-intercept's absence verifies that the hyperbola does not intersect or touch the y-axis. This aligns with the nature of hyperbolas, where they tend to avoid the origin, widening out toward infinite asymptotic directions.
Graphing Hyperbolas
Graphing hyperbolas can be intriguing as they present different characteristics compared to parabolas or circles. When you graph \(xy = 5\), you're dealing with a product relationship, rather than a sum or difference. Here, the graph is a hyperbola located in the first and third quadrants of the Cartesian plane.

Key attributes of this hyperbola include:
  • No intercepts on either axis, as previously discussed, due to infinities involved.
  • It symmetrically opens around the line \(y = x\) and \(y = -x\), serving as its asymptotes.

Understanding its shape and position helps when plotting the curve to ensure accuracy in depiction and analysis.
Algebraic Inconsistencies in Hyperbolic Equations
When dealing with certain equations, particularly hyperbolic ones such as \(xy = 5\), inconsistencies arise if you assume the graph intercepts any axis. Setting variables to zero—a typical method to find intercepts—leads to unsolvable equations.

These inconsistencies occur because setting either variable to zero implies an infinite value must result for the equation to hold true. This defies practical algebraic logic and graphically translates to the hyperbola existing entirely in the regions unaffected by the axes.

Hence, embracing the idea of infinity and understanding the concept of asymptotic behavior is crucial when navigating these algebraic terrains to grasp the true state and appearance of the graph.

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