Course 3 Chapter 4

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

Is this mapping a function or not a function? 

• Function
• Not a Function 

All of the x values or inputs are called what?

• Domain
• Range
• Relation
• Function

Which graph is a function?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

Construct a linear model for the table.

• $y=10x+8$

• $y=5x+8$

• $y=5x+18$

• $y=5x+13$

A factory produces 25 cars each day.  There are already 20 that have been completed.  Construct a linear model to represent the number of cars in the factory.

• $y=20x+25$

• $y=25x+20$

• $y=-25x+20$

• $y=25x-20$

Check the correct answers: In order to be a linear function:

• It's graph must have a straight line

• It must pass a polygraph test

• Each x-value has only one y-value

• A parabola is a Linear Function

Which of these functions are linear?

Select two answers.

• $y\ =\ 3\ -\ x^2$

• $y=x$

• 
• 
• $y\ =\ x^3\ +\ 3$

Find the rate of change

• 1
• 2
• 11
• Not a constant slope/Non-Linear

Which function is linear?

• y = 2x + 4
• y = 2x² + 4
• y = 2x(4 − 3x)
• xy = 15