Relations, Functions, and Linear Functions

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

What is the RANGE of the following relation: (9, -2) (4, 3)  ( 8, 10) ( -4, 8)

• -4, 4, 8, 9

• -2, 3, 8, 10

• (9, -2) ( -4, 8)

• (4, 3) (8, 10)

Does this represent a function?

• Yes

• No

• It is a function because each x has only one y.
• It's not a function because an x has multiple y's.
• It's not a function because a y has multiple x's.
• It is a function because each y has only one x.

Which of these is NOT the same as the others

• Output

• Input

• Dependent Value

• Y-Value

Is this table a function or not a function? 

• Function
• Not a Function

Easy Car Rental charges $8.50 an hour plus a rental fee of $25.50. Which equation represents the total charges for x hours?

• y = 8.50x + 25.50

• y = 25.50 + 8.50

• y = 8.50+ 25.50x

Find the slope of the line.

• -2
• 2
• -1
• 1

Which equation represents the following graph?

• y = 3x + 2
• y = -2x + 3
• y = 2x + 3
• y = -3x + 2

Which is the graph of y=-x+2?

• A
• B
• C
• D