What is a Function and How Do We Evaluate It? Precalculus

We introduce what a function is, what a function machine is, and how we evaluate functions. We evaluate functions with negative numbers, positive numbers, fractions, and even a variable! #Precalculus / #Precalc

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Functions can be abstract. It doesn't help that we start out teaching them as y = mx+b instead of f(x)=mx+b. But, it's really the same thing if y=f(x). I hope this one helps you with the fundamentals of functions.