I have no idea lol who would know that answer
The answer is false. many point and shoot cameras support focusing
For the first one it isn't A btw
Answer:
See attachment.
Explanation:
The given function is 
This function is of the form
where 0<b<1
This is an exponential decay function.
To see it clearly, we rewrite this function to get:

This graph will be asymptotic to the x-axis as x-values approaches positive infinity.
The y-intercept is at (0,1).
The graph is shown in the attachment