Functions and Inverses

Is this graph a function or not a function? 

• Function
• Not a Function 

f(x)=2x+1
If f(x)=4, what is the value of x?

• 3/2
• 2
• 1/2
• 4

What are all the x-intercepts?

• (-2.55, 0), (2.55, 0)
• (-3,0), (-2,0), (2,0), (3,0)
• (0, 36)
• (-∞,∞)

What is the end behavior as x → -∞ f(x)→ ?

• -∞
• ∞

What is the range of this quadratic function?

• All real numbers.
• [2, infinity)
• [4, infinity)
• (negative infinity, 4]

Find the zeros.

• x = 0 and 4
• x = 0 and -4
• x = 0
• x = -4

What is the interval of decrease?

• (negative infinity, -2)
• (-2, infinity)
• (2, infinity)
• (negative infinity, 2)

Identify the increasing interval:

• (0, 4)
• (1, 0) U (1, 4)
• (-1, 1)
• (-∞, -1) U (1, ∞)

What is g(7) if:

• -17
• -13 
• 13       
• 17

What is f(-2)?

• 4
• 1
• 1
• DNE