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Is it a function or not?
Is it a function or not?
20-Point Math Test
Fast food
Celida, 16
Celida, 18
Sandy, 16
Kenny, 20
Billy Bob, 18
Celida, 18
Sandy, 19
Kenny, 20
Billy Bob, 19
Two Possible Functions
Input: Lessons Input: Gifts
Output: Years Output: Grad%
(15, 5) (1, 20%)
(20, 4) (2, 35%)
(30, 3) (4, 65%)
(15, 2) (0, 0%)
(30, 4) (5, 100%)
What is a function?
In this lesson you have learned to tell if a set of ordered pairs represents a function by matching the x-values to the y-values.
A function is a relation in which a rule assigns every input a unique output.
Ordered pairs
*Important*
Input ----> Output
x-value and a y-value that correspond to an input and an output
(3, 9)
(x, y)
(input, output)
8.F.A.1
Determine whether a set of ordered pairs represents a function.
Match x-values to y-values