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Test for symmetry with respect to each axis and to the origin. $$x y^{2}=-10$$

Short Answer

Expert verified
The graph of the equation \(x y^{2}=-10\) is symmetric with respect to the x-axis only.

Step by step solution

01

- Test for x-axis symmetry

Replace 'y' with '-y' in the given equation, \(x (-y)^{2}=-10\). This simplifies to \(x y^{2}=-10\), which is the original equation. Thus, the graph is symmetric around the x-axis.
02

- Test for y-axis symmetry

Replace 'x' with '-x' in the original equation, \(-x y^{2}=-10\). This simplifies to \(x y^{2}=10\), which is not equal to the original equation. Thus, the graph is not symmetric around the y-axis.
03

- Test for Origin symmetry

Replace 'x' with '-x' and 'y' with '-y' in the original equation, \(-x (-y)^{2}=-10\). This simplifies to \(x y^{2}=10\), which is not equal to the original equation. Thus, the graph is not symmetric with respect to the origin.

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Key Concepts

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

Axis of Symmetry
When a student studies the concept of axis of symmetry, they learn about an imaginary line that divides a graph into two mirror-image halves. In calculus and algebra, understanding the axis of symmetry assists in graphing functions and analyzing their properties.

For our exercise \(xy^2=-10\), we look for symmetry by substituting in values. When we replace \(y\) with \( -y \) and the equation remains unchanged, as seen in Step 1, it indicates that the graph folds over the x-axis. This shows x-axis symmetry because mirroring across the x-axis does not affect the graph's equation.

This concept is immensely helpful in simplifying calculus problems, especially when determining the behavior of graphs without plotting every single point.
Origin Symmetry
The concept of origin symmetry relates to a graph being symmetrical about the origin, which is the point (0,0) on the Cartesian plane. To have origin symmetry, a graph must look the same when rotated 180 degrees around the origin.

In our exercise, we check this by replacing both \(x\) and \(y\) with their negatives, resulting in an equation that does not match the original in Step 3 (\(xy^2=10\) instead of \(xy^2=-10\)). This indicates the absence of origin symmetry. Understanding this type of symmetry is critical since it can reveal the nature of a function, particularly when dealing with odd and even functions in calculus problems.
Graph Symmetry
Discussing graph symmetry takes students into the visual aspect of studying functions and curves. Symmetry in a graph helps to predict and understand how a function behaves and simplifies graph sketching.

Graph symmetry comes in several types, including symmetry with respect to the x-axis, y-axis, the origin, or even about other lines. When a graph has symmetry, it means there is a distinct pattern or repetition that reflects across a line or point.

In our step-by-step solution, we investigated different types of symmetry for the equation \(xy^2=-10\). We concluded symmetry about the x-axis but not the y-axis or the origin. Grasping this concept facilitates the learning of more advanced calculus topics, such as integrals, where symmetry can be used to evaluate areas under curves more efficiently.
Calculus Problems
When faced with calculus problems, students often need to analyze and graph equations to find derivatives, integrals, or ascertain continuity and limits. Symmetry is a valuable tool in this analysis.

In our example, after testing for symmetry across the x-axis, y-axis, and the origin, we have foundational information that can be used to address various calculus problems related to this equation. For instance, knowing there is x-axis symmetry could be a timesaver when solving for area under the curve in an integral problem because you may only need to calculate the area for one-half and then double it.

Recognizing symmetry within calculus not only assists in graph comprehension but also in problem-solving, making it a powerful aspect of foundational mathematics education.

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Most popular questions from this chapter

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