In this activity, you will be given several examples for which you are to find specific values.

1. If f(x) = x² – 1, find:
   
   f(3)
   
   f(-5)
   
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   Check Your Answer

   f(x) = x² – 1
   
   f(3) = 3² - 1
   
   f(3) = 9 - 1
   
   
   f(3) = 8
   
   
   f(x) = x² – 1
   
   f(-5) = (-5)² - 1
   
   f(-5) = 25 - 1
   
   
   f(-5) = 24


2. If G(n) = 8 – 3n, find:
   
   G(-2)
   
   G(1)
   
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   Check Your Answer

   g(x) =  8 – 3n
   
   g(-2) = 8 – 3(-2)
   
   g(-2) = 8 – (-6)
   
   g(-2) = 14
   
   g(x) = 8 – 3n
   
   g(1) = 8- 3(1)
   
   g(1) = 8 – 3
   
   g(1) = 5


3. Rewrite y equals (x+3) divided by 10 y = x + 3 10  in function notation.
   
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   Check Your Answer

   (x+3) divided by 10 f(x) = x + 3 10 (Any letter can be used in place of the f.)


4. If h(x) = (3x)² + 2, find:
   
   h(4)
   
   h(- 2)
   
   Interactive popup. Assistance may be required.

   Check Your Answer

   h(x) =  (3x)² + 2
   
   h(4) = (3 • 4)² + 2
   
   h(4) = (12)² + 2
   
   h(4) = 144 + 2
   
   h(4) = 146
   
   
   h(x) =  (3x)² + 2
   
   h(-2) = (3 • -2)² + 2
   
   h(-2) = (-6)² + 2
   
   h(-2) = 36 + 2
   
   h(-2) = 38