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## Main Question or Discussion Point

Hey guys, I'm back.

I'm taking pre-calc this year as a sophomore in high school and had a few simple questions about functions.

1. What is the difference between a function and an equation?

2. Why do people sometimes write "y = f(x)"? What is "y = f(x)" saying?

3. Can I use "y" and "f(x)" interchangeably?

Thanks in advance!

I'm taking pre-calc this year as a sophomore in high school and had a few simple questions about functions.

1. What is the difference between a function and an equation?

2. Why do people sometimes write "y = f(x)"? What is "y = f(x)" saying?

3. Can I use "y" and "f(x)" interchangeably?

Thanks in advance!