Estimating Values of Functions

The function  $f\left(x\right)=-\frac{1}{2}x^2+2x+9$  is graphed above. If  $f\left(x\right)=11$  , what is the value of x?

• x = 4

• x = 11

• x = 0

• x = 2

The function $f\left(x\right)=\frac{4}{x-2}+3$  is graphed above. If  $f\left(x\right)=4$  what is the value of x?

• 5

• 6

• 0

• 2

The function $f\left(x\right)=16\left(\frac{1}{2}\right)^x$  is graphed above. If  $f\left(x\right)=8$ , what is the value of x?

• 0.25

• 1

• 8

• 0.5

The data represents the function $f\left(x\right)=\frac{1}{4}\left(x-4\right)-8$  what is the value of x, if  $f\left(x\right)=-4$  ?

• 8

• 4

•  $-4$  

• 0

That data is modeled by the function $f\left(x\right)=\frac{4}{x+3}+6$ , what is the value of x if  $f\left(x\right)=7$  ?

• 1

• 5

• 2

• 7

The data represents the $f\left(x\right)=2\left(4\right)^x$  . If  $f\left(x\right)=2$  what is the value of x?

• -1

• 0

• 1

• 3