Answer:
Amy's yearly salary in 2011 was $27,800
Explanation:
we have
![y=25,000+700x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/du3u0k5873j0irdujwamlxmvvc9giy0gkp.png)
where
x ---> is the number of years since 2007
y ---> Amy's yearly salary in dollars
To find out what was her salary in 2011, first determine the value of x
![x=2011-2007=4\ years](https://img.qammunity.org/2020/formulas/mathematics/middle-school/nelcxgtkdxvj34mv5oscwf95fc0ad4skly.png)
substitute the value of x in the equation above
![y=25,000+700(4)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/y6wudh728k1l9inzjmjum4fagiz1gw78k0.png)
![y=\$27,800](https://img.qammunity.org/2020/formulas/mathematics/middle-school/b1tclxzmyida6c3y0udjjlb23bon8p28q9.png)
therefore
Amy's yearly salary in 2011 was $27,800