Today in the land of Math, I learned about functions. A function is an equation like f(x) = 2x + 1. F(x) is the f times x value, and can be used as the y for use in solving the equation. Domain is an important part of functions, and explain the x-entries possible. The y values are represented in range. Domain can be almost anything. In the case of square roots, however, one cannot put negative values in as x, since negative radicals are not in the real range. In a fraction, the denominator cannot be 0, or undefined.
Thanks for reading,
Kaili Chiu
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