# Functions

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 Standard form of a parabola and vertex equations Standard form of a parabola can you help me with some questions? Tutor.com In this Early Edge video lesson, you'll learn more about Introduction to Algebra, so you can be successful when you take on high-school Math & Algebra. The Princeton Review In this Early Edge video lesson, you'll learn more about Number Lines and Inequalities, so you can be successful when you take on high-school Math & Arithmetic. The Princeton Review In this Early Edge video lesson, you'll learn more about Number Families, so you can be successful when you take on high-school Math & Arithmetic. The Princeton Review see picture Tutor.com determine which of the relations are functions- {(-2, 7), (-1,5), (0,3), (1,1), (2,1)} Tutor.com There's a certain part in functions that im not familiar with. Domains and ranges, i don't understand them. Tutor.com A function is like a machine: it has an input and an output. Math is Fun Using this virtual manipulative you may: * Graph a function * Trace a point along the graph * Dynamically vary function parameters * Change the range of values displayed in the graph * Graph multiple functions * Restrict the domain of a function * Zoom in on a region of the graph National Library of Virtual Manipulatives