Evaluating Functions

f(x)=x+3

f(-5) = ?

• -2

• -1

• -8

• 7

Evaluate f(x)=-2t²+ 1 for f(2)

• 9
  

• 17

• -17

• -7

f(x) = x² − 5x
f(4) = ?

• −4

• 126

• 24

• 84

f(x) = 4x + 5

f(4) = ?

If g(x) = -8x + 1, find g(-2).

• -8

• -15

• 17

• 8

If f(x) = 2x + 5, find f(-3).

• 1

• -1

• 4

• -4

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

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4

• 1

• 2

• 3

• 4