Answer:
It does not show variation
Step-by-step explanation:
Given

Required
Determine if there's direct variation between x and y
The general form of direct variation is:

Make y the subject of formula in the given parameters;


Compare
to 
<em>Since they are not of the same form, then the given equation do not show direct variation</em>
An exponential function can be expressed as:
y=ab^x we have two points so we can solve
64/8=(ab^4)/(ab^1)
8=b^3
2=b, now we have:
y=a(2^x), using point (4,64)
64=a(2^4)
64=16a
4=a so
y=4(2^x)
It would be ten because 40 divided by 4 is ten
Answer:

Step-by-step explanation:
Hello,
To know the height of the baseball when it is hit we have to compute h(0), as t = 0 is when the baseball is hit into the air.

So, the answer is <u>2 feet.</u>
<u />
h(x) is a parabola which can be written as
, it means that the vertex is the point (-b/2a,h(-b/2a)).
The baseball reached its maximum height after

And the maximum height of the baseball is h(4).

Hope this helps.
Do not hesitate if you need further explanation.
Thank you