Notes 5 2
- 1. Relations and FunctionsChapter 5, Section 2Algebra 1
- 2. What is a Relation?A relation is a set of ordered pairs.
- 3. DOMAINThe domain of a relation is the set of the first coordinate of the ordered pair. In the function, f(x) = x+22, the domain is all real numbers.
- 4. RANGEThe range is the set of all the second coordinates of a function. In the function f(x) = |x|, the range is the set of all nonnegative numbers.
- 5. Finding Domain and RangeGiraffesFind the domain and the range of the data above.
- 6. Ordered PairsList the information as ordered pairs(18, 4.25)(20, 4.40)(21, 5.25)(14, 5.00)(18, 4.85)Domain: {14, 18, 20, 21}Range: {4.25, 4.40, 4.85, 5.00, 5.25}
- 7. Example 1Find the domain and range of the relation represented by the data in the table.