Directions: Using the integers −9 to 9 at most one time each, place an integer in each box to create an arithmetic sequence so that the coefficient in the function that represents it is the greatest possible value.

### Hint

How can you shift a sequence so that you can use the integers you have available?

### Answer

There greatest possible coefficient is 6 from: -3, 3, 9, … = 6x + -9

Source: Robert Kaplinsky