Solved Examples. The equation of a vertical line does not have a y-intercept since a vertical line never crosses the y-axis. These unique features make Virtual Nerd a viable alternative to private tutoring. Improve your math knowledge with free questions in "Identify functions: vertical line test" and thousands of other math skills. More About Vertical Line Test. In this non-linear system, users are free to take whatever path through the material best serves their needs. Student Name:Jasmyne Ross Date:09/06/2020 Lines and Functions Vertical line test Sample Question For each graph below, state Identifying Functions & Using the Vertical Line Test Now that you've studied the three examples from our first functions lesson are you ready to try a few on your own?. Answer: D 2. Virtual Nerd's patent-pending tutorial system provides in-context information, hints, and links to supporting tutorials, synchronized with videos, each 3 to 7 minutes long. ; The equation of a vertical line always takes the form x = k, where k is any number and k is also the x-intercept . Let's recap a few things that will help you identify whether the following relations are functions. What's the Vertical Line Test? The vertical line test tells you if you have a function, while the horizontal line test tells you if that function is one to one (injective). Examples of Vertical Line Test. Vertical line test is generally done by using a ruler. A vertical line is drawn across the edge of the ruler from one end of the x-axis to the other end. This is also called a vertical line test. A graph will be considered as a function if it has only one output y for each input x. Using vertical line test, the graph given represents a function as the vertical line drawn intersects the graph at only one point. Therefore, a vertical line cannot be a function. The vertical line test is a simple method for determining if an equation is indeed a function. Fortunately, there is an easier way. Horizontal Line Test vs. Vertical. For example, on the interval [âÏ/2, Ï/2], y = sin x is one-to-one and therefore has an inverse for that interval. Example : This graph does not represent a function: for example, the vertical line Working With Graphs. ()The slope of a vertical line is undefined because the denominator of the slope (the change in X) is zero. The test states that a graph represents a function if and only if all vertical lines intersect the graph at most once. View vertical line test.pdf from MATH 111 at Jackson State University. 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