Exponential Functions Review

 $f\left(x\right)=2\cdot\left(0.4\right)^x$  , what is the y-intercept of  $f\left(x\right)$  ?

• 2

• 0.4

• 0.8

• 5

 $f\left(x\right)=2\cdot\left(0.4\right)^x$  , what is the asymptote of  $f\left(x\right)$  ?

•  $x\ =\ 2$  
  

•  $y\ =\ 2$  
  

•  $x\ =\ 0$  
  

•  $y\ =\ 0$  
  

 $g\left(x\right)\ =\ -3\cdot\left(1.5\right)^x$  , what is the y-intercept of  $g\left(x\right)$  ?

• 3

• -3

• 1.5

• -4.5

 $g\left(x\right)\ =\ -3\cdot\left(1.5\right)^x$  , what is the asymptote of  $g\left(x\right)$  ?

•  $x\ =\ -3$  
  

•  $y\ =\ -3$  
  

•  $y\ =\ 0$  
  

•  $x\ =\ 0$  
  

Isabel plans to graph the exponential function  $y\ =\ 9\left(\frac{2}{3}\right)^x$  .  Determine if the "Isabel's graph will increase from left to right" is true or false.

• True

• False

Isabel plans to graph the exponential function  $y\ =\ 9\left(\frac{2}{3}\right)^x$  .  Determine if the "Isabel's graph will have a y-intercept of (0, 9)" is true or false.

• True

• False

Isabel plans to graph the exponential function  $y\ =\ 9\left(\frac{2}{3}\right)^x$  .  Determine if the "As x increases, the y-values on Isabel's graph will approach 0" is true or false.

• True

• False

Isabel plans to graph the exponential function  $y\ =\ 9\left(\frac{2}{3}\right)^x$  .  Determine if the "Isabel's graph will have an asymptote of x = 0" is true or false.

• True

• False

Isabel plans to graph the exponential function  $y\ =\ 9\left(\frac{2}{3}\right)^x$  .  Determine if the "Isabel's graph will have an x-intercept of  $\left(\frac{2}{3},0\right)$  " is true or false.

• True

• False

Which equation represents the graph?

•  $f\left(x\right)=10\left(1.4\right)^x$  

•  $f\left(x\right)=10\left(2.5\right)^x$  

•  $f\left(x\right)=10\left(0.6\right)^x$  

•  $f\left(x\right)\ =\ -10\left(1.5\right)^x$  

•  $f\left(x\right)\ =\ -10\left(0.5\right)^x$