Representing Functions

1
Representing Functions

• 2.5

2
Definitions

• Function- relationship between input and output
• Input The number you put into an equation
• Output the number kicked out by the equation
• Domain All possible input values
• Range All possible output values

3
Graphing Equations

• Graph y 2x-1
• Make a table of values

4
Example

• Every year, the Smiths buy a family membership
  at the local swimming pool. The memberships costs
  are 30 for an individual and 60 per family with
  a 5 guest charge per visit. The annual cost for
  the Smiths is a function of the number of guests
  they take to the pool.
• 1) Write an equation for the function
• 2) Make a table of values
• 3) Graph the function

5

• Let C annual cost
• Let g guests
• C 60 5 per guest x guests
• C 60 5g

• C 5g

6
Cost
Guests
7
Homework

• P. 81 1-18