Evaluating Functions with Function Notation

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How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

If f(x) = 2x + 1, what would be your first step to find f(1)?

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

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• -6

• 14

• -14

Mathematical Equivalence

ON

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• -28

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If g(x) = 1 - 3/4x,

7. g(-12) = ​ (a)  

8. g(0) = ​ (b)  

9. -5 times g(4) - 1 = ​ (c)  

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• -9

• You can handle the fraction!

Given h(x) = -9x +5, find h(8).

Mathematical Equivalence

ON

If f(x) = -4x - 5

what is f(1)?

Mathematical Equivalence

ON