Turning points

How many turning points does a graph of this expression have?

 $y=12x+3-4x^3$  

• 1

• 2

• 3

• 4

Select the correct statement about this expression:

 $4-3x^2$  

• The turning point is a maximum and is located at (0,4).

• The turning point is a minimum and is located at (0,4).

• The turning point is a maximum and is located at (4,0).

• The turning point is a minimum and is located at (0,4).

Select the correct statement regarding the second derivative: 

• The second derivative is positive at a maximum.

• The second derivative is negative at a maximum.

• The second derivative is always positive at a turning point.

• The second derivative is always negative at a turning point.

Select the correct equation to describe this graph:

• $y=x^2-x$

• $y=x^3-1$

• $y=x^3-x$

• $y=-x^2-x$

 $4x^3-3x+1$  

Select the correct graph of the equation:

• 
• 
• 
•