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Feb 28, 2021 · Calculus 3 video that explains level curves of functions of two variables and how to construct a contour map with level curves. We begin by introducing a typical temperature map as an...
- 21 min
- 22K
- Houston Math Prep
Given a function [latex]f\,(x,\ y)[/latex] and a number [latex]c[/latex] in the range of [latex]f[/latex], a level curve of a function of two variables for the value [latex]c[/latex] is defined to be the set of points satisfying the equation [latex]f\,(x,\ y)=c[/latex].
Level curvesInstructor: David JordanView the complete course: http://ocw.mit.edu/18-02SCF10License: Creative Commons BY-NC-SAMore information at http://ocw.m...
- 10 min
- 353.4K
- MIT OpenCourseWare
Together they usually constitute a curve or a set of curves called the contour or level curve for that value. In principle, there is a contour through every point.
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- 39
For $c=1$, the level curve is $x^2-y^2=1$, which is a hyperbola passing vertically through the $x$-axis at the points $(\pm 1,0)$. For $c=2$, the level curve is $\left(\frac{x}{\sqrt{2}}\right)^2-\left(\frac{y}{\sqrt{2}}\right)^2=1$, which is a hyperbola passing vertically through the $x$-axis at the points $(\pm \sqrt{2},0)$.
One way to collapse the graph of a scalar-valued function of two variables into a two-dimensional plot is through level curves. A level curve of a function $f(x,y)$ is the curve of points $(x,y)$ where $f(x,y)$ is some constant value. A level curve is simply a cross section of the graph of $z=f(x,y)$ taken at a constant value, say $z=c$. A ...
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Level curves and contour plots are another way of visualizing functions of two variables. If you have seen a topographic map then you have seen a contour plot. Example: To illustrate this we first draw the graph of z = x2 + y2. On this graph we draw contours, which are curves at a fixed height z = constant.
