Functions and Graphs

Given 
f(x)= 2x² + 5x - 17, find f(-1). 

• f(-1) = -20

• f(-1) = -24

• f(-1) = 10

• f(-1) = 14

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

• 0

• -5

• 3

• -3

Evaluate the function for the given value:

• 1

• -11

• -15

• -1

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)

Is this mapping a function or not a function? 

• Function

• Not a Function

Is this graph a function or not a function? 

• Function 

• Not a Function

Which graph is NOT a function?

• Graph 1

• Graph 2

• Graph 3

• Graph 4

Is the graph pictured a function?

• Yes

• No

Is this mapping a function or not a function? 

• Function

• Not a Function