In the previous post, we have learned how to analyze equations of functions and determine their domain and range. We have observed that the range of the functions and are the set of real numbers greater than or equal to since squaring a number or getting its absolute value results to or a positive real […]

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# College Algebra

## Understanding Domain and Range Part 1

The domain of a function is the set of x-coordinates of the points in the function. The range of the function f is the set of y-coordinates of the points in the function. So if we have a function f with points (-3, -2), (-1, 3), (2, 3), and (5,4), then the domain of the […]

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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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