Relations and Functions
What is a relation?
A set of ordered pairs.
Function Rules, tables, and graphs are ways to_____?
Model functions.
Write a function rule for the table:
X F(X)
1 5
2 6
3 7
4 8
F(X) = X+4.
What do you call each number in a sequence?
A term.
How do you read F(X)?
F of X.
Which way of modeling a function gives you a visual picture of the function?
A graph.
what is the constant of variation for inverse variation?
K, the product of X and Y.
What is another name for a number pattern?
A sequence.
Which way of modeling a function identifies specific input and output values of the function?
What is the constant of variation for direct variation?
K, the coefficient of X.
What do you call a conclusion you make by inductive reasoning?
A conjecure.
Is (3,0), (-2,1), (0,-1), (-3,2), (3,2) a function?
Nope.
What is discrete data?
Data that involve a count of items.
What is an inverse variation?
A function int the form XY=K or Y=K/X, where K isn't 0. Y varies inversely with X.
What is inductive reasoning?
Making conclusions based on patterns you observe.
What is it called when you use F(X) to indicate outputs?
Function notation.
What is continuous data?
Data where numbers between any 2 data values have maning.
What is a direct Variation?
A function in the for Y=KX, where K isn't 0. Y varies directly with X.
How do you form an arithmetic sequence?
You add a fixed number (the common difference) to each previous term.