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Carnegie Chapter 2

What is the domain? The x-values, or input
What is the range? The y-values, or output
What is a discrete graph? A graph that does not have points connected; all sequences are discrete
What is a continuous graph? A graph that does have points connected
What is a function? A relation in which the domain (x-values) do not repeat!
What is a relation? Any set of ordered pairs
What is the "vertical line test?" A way to determine if a graph is a function; you look vertically across the graph and if you don't cross more than two point the graph is a function
How do you know if an equation represents a function? Pick an x-value, plug it in and solve for y. If you only get one answer, it is a function!
How do you know if a graph is linear? If it forms a straight line