Answer: The house will be worth of $268000.
Step-by-step explanation:
Since we have given that
Amount Cindy paid for bought a house in 1999=$218000
In 2006, Amount of house = $253000
First we will find the slope i.e "the rate of change"
[tex]m=\frac{253000-218000}{2006-1999}\\\\m=\frac{35000}{7}\\\\m=5000[/tex]
So, the equation of slope will be
[tex]y-y_0=m(x-x_0)\\\\y-218000=5000(x-1999)[/tex]
The house will be worth of in 2009 will be
[tex]y-218000=5000(2009-1999)\\\\y-218000=5000\times 10\\\\y-218000=50000\\\\y=50000+218000\\\\y=268000[/tex]
Hence, the house will be worth of $268000.