Answer:
b. 3lbs.
interquartile range is the range in the box on the graph, without the whiskers.
..................
we have the function
![f(x)=20(\frac{1}{4})^{x}](https://tex.z-dn.net/?f=f%28x%29%3D20%28%5Cfrac%7B1%7D%7B4%7D%29%5E%7Bx%7D)
we know that
In the equation of the exponential function of the form
![f(x)=a(b)^{x}](https://tex.z-dn.net/?f=f%28x%29%3Da%28b%29%5E%7Bx%7D)
a is the initial value
b is the base
x is the exponent
The initial value is the value of the function when the value of x is equal to zero
in this problem
for ![x=0](https://tex.z-dn.net/?f=x%3D0)
![f(0)=20(\frac{1}{4})^{0}](https://tex.z-dn.net/?f=f%280%29%3D20%28%5Cfrac%7B1%7D%7B4%7D%29%5E%7B0%7D)
![f(0)=20(1)=20](https://tex.z-dn.net/?f=f%280%29%3D20%281%29%3D20)
the initial value is the point ![(0,20)](https://tex.z-dn.net/?f=%280%2C20%29)
therefore
the answer in the attached figure
Answer:
these problems are always tough b/c they want you to translate normal thinking into math jargon :D soooo....
Step-by-step explanation:
they use the point slope formula... which looks like
y =
= m(x -
)
where (
,
) are the x , y coordinates of some point you're given.. sooo
they give us two points.. so we can put either one of those into the formula.. but we also have to find m.... or the slope ... to find m.. use the slope equation of
m = (
-
) / (
-
)
call either point P1 and P2 ... i'll pick the top point as P1 and bottom as P2
then
m = ( -3 -1 ) / ( 1 - 3 )
m = -4 / -2
m = 2 ( yay :) )
now use either point and plug it into the point slope formula, i'll use P1
y - 1 = 2(x-3) ( this is the answer they are looking for )
1/4 or 25% were taken by car of the 600
600 x .25 = 150
150 is the answer