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 Interactive Checkpoint
 Function:  A rule of matching elements of two sets of numbers in which an input value from the first set has only one output value in the second set.

a) Which of the following examples illustrates a function?

b) Sally earns $6 per hour for babysitting and receives a $4 tip at the end of the night. Her earning can be represented by the function

d = 6h + 4

where d dollars are earned for h hours of babysitting. Enter the missing values in the table below that relate to hours worked or dollars earned.

h hours worked

d dollars earned

graded response
1  10
 2
5  
  52