**Problem : **
Could the following be the graph of a function
*f* (*x*)
?

Figure %: Is this graph a function
*f* (*x*)
?

**Problem : **
Find a linear function that passes through the points
(1, 3)
and
(- 2, - 3)

**Problem : **
Use a power function to solve the following problem. A mathematician named George mows
lawns all summer and manages to save up
3, 000
dollars. George decides to invest his
earnings in an account that pays an annual interest rate of
7
percent. How much money
will George have in his account after 5 years (assuming he does not make any further
deposits)?