Evaluating Functions for Inputs in Their Domains

f(x)=-x+3
f(7)=?

• -4
• -6
• 3
• 13

f(x)=4x+5
f(4)=

• 21
• -11
• -31
• 25

f(x)=x+3
f(-5)

• -2
• -1
• -7
• 7

f(x)=x²-5x
f(4)=

• -4
• 126
• 24
• 84

f(x)=2x+2
f(2)=

• 6
• -8
• 10
• 8

f(x)=x²-5
Find the domain, if f(x) = -1

• 2
• -2
• 0
• 1

For what value of x does f(x) = -2?

• 0
• -5
• 3
• -3

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

Evaluate f(x) = x² for f(-8)

• 64
• -64
• -16
• 16