More on multiple representations, distinguishing between functions and relations, determining the domain and range.

1. Domain and Range:
Matching Sets
Matched set by flickr user K2D2vaca

2. Given a relation represented by the following ordered pairs, write an
equation expressing the relation.
x 1 2 3 4
y 5 10 15 20
Sketch the graph.
What is the domain and
range of the relation?

3. x 1 2 3 4
y 5 10 15 20

4. A function is a relation, a set of ordered pairs (x, y), such that for each
value of x there is exactly one value of y.
Is the relation A = {(2, 5), (7, 3), (6, 4), (5, –3)} a function?
Is the relation given by the rule y² = x a function?
Is the relation B = {(2, 7), (5, 11), (2, 5), (3, –1)} a function?
Is the relation given by the rule y = 2x a function?