# Write a function...

• Aug 31st 2013, 04:10 PM
NRK0208
Write a function...
In March 2006, the Bureau for Economic Analysis (BEA) issued a press release detailing per capita income rankings for the states. An excerpt is provided...
"Connecticut led the nation with a per capita income 38 percent above the national average. Louisiana's per capital income was 28 percent below the national average"
Write the equation of a function that relates the per capita income of Connecticut to the per capita income of Louisiana.

This is my first time posting here so I'm still a little confused, if I did anything wrote with where/how I posted this please just let me know!

Any help is appreciated! Thank you so much!
• Aug 31st 2013, 05:28 PM
Soroban
Re: Write a function...
Hello, NRK0208!

Quote:

Connecticut led the nation with a per capita income 38 percent above the national average.
Louisiana's per capital income was 28 percent below the national average.
Write the equation of a function that relates the per capita income of CT to the per capita income of LA.

Let $a$ = the national average.

Then: . $\begin{Bmatrix}CT \;=\;1.38a & \;\Rightarrow\; & a \;=\; \dfrac{CT}{1.38} & [1] \\ \\ LA \; =\; 0.72a & \Rightarrow & a \;=\; \dfrac{LA}{0.72} & [2] \end{Bmatrix}$

Equate [1] and [2]: . $\dfrac{CT}{1.38} \:=\:\dfrac{LA}{0.72} \quad\Rightarrow\quad \dfrac{CT}{LA} \:=\:\dfrac{1.38}{0.72}$

Therefore: . $CT \:=\:\dfrac{23}{12}LA$
• Aug 31st 2013, 06:59 PM
NRK0208
Re: Write a function...
Thanks so much!!!!!!!