introduction to funcions

Calculate the x-intercept for y = -3x+6

• 2

• 6

• (2,0)

• (6,0)

Put down the intervals where the function increases:

• <-7,-3>

• <-3,-2>

• <-2,4>

• <4,8>

Calculate the value of the function 

 $f\left(x\right)=-x^2+3x-7$  for the argument 5

List the zero(s) of the funcion:

What is the domain of the function

 $f\left(x\right)=\frac{x-4}{\sqrt{4x+8}}$  

• x>-2

• x>2

• x<-2

• x<2

For the function $f\left(x\right)=3-\frac{x-2}{x+2}$  check which of the given points belogs to its graph:

A(-2,4)

B(4,-2)
C(0,4)

• A

• B

• C

• none of them

For the given function list the intervals where the values are less than zero.

Is it a function?

• Yes

• No

 $f\left(x\right)=\frac{\sqrt{x+9}}{27x-3}$  

Calculate y-intercept for the given function

• 9

• -1

• (-9,0)

• (0,-1)

Estimate your level of knowledge on functions.

• not good

• not bad but still need to learn

• satisfying

• high