Function Algebra

Evaluate f(n)=-4n+1 at n=7

• f(7)=7

• f(7)=29

• f(7)=-27

• f(7)=2

• f(5)=5

• f(5)=25

• f(5)=30

• f(5)=15

• g(-1)=-5

• g(-1)=5

• g(-1)=3

• g(-1)=-2

• f(4)=18

• f(4)=6

• f(4)=-4

• f(4)=9

f(x) = x+7 find f(4)

• 11

• 12

• 9

• 10

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

Does this mapping diagram represent a function?

• No, because there are repeating input values

• Yes, because there are no repeating input values

f(x) = x+7 find f(1)

• 5

• 6

• 7

• 8

g(x) = 3x + 1
g(2) = _______

• 6

• 7

• 8

• 9

f(x) is the same thing as ______.

• y

• x

• input

• an equation