### Home > MC1 > Chapter 9 > Lesson 9.1.3 > Problem 9-37

9-37.

Everyone's dots will look different, but make sure there isa pattern. Sharon's first three figures are below.

For each figure of Sharon's pattern, there are 1+ 3*x* dots, where *x* is the figure number.

In the 30th Figure, there are 91 dots, since 1+3(30) = 91.

Try writing a similar expression for the number of dots in your pattern.