What is the horizontal line test?

In January of this year, we have discussed about the vertical line test. We have learned that if a vertical line intersect a graph more than once, then that graph is not a function. In this post, we learn about the horizontal line test and its relation to inverse functions. Suppose we have a function . Then, […]
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What exactly is the vertical line test?

A function as we have discussed is a relationship between two sets, where each element in the first set has exactly one corresponding element in the second set. If we think of candy which costs 10 cents each, then we can say that 1 candy costs 10 cents, 2 candies cost 20 cents, 3 candies cost 30 cents, and […]
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Basic Concepts of Functions

Note:  This is the second part of the Functions Series. To view the other parts, click the link below. Part I: Introduction to Functions Part II: Basic Concepts of Functions *** In the first part of this series, we have discussed that a function is a relationship between two sets where for each value in […]
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