Olivia read a book. She started on page $20$, and each minute she read $3$ pages. Let $g(n)$ be the page Olivia was on at the *beginning* of the $n^\text{th}$ minute. **$g$ is a sequence. What kind of sequence is it?** [[☃ radio 1]] **Write an explicit formula for the sequence.** $g(n)=$ [[☃ expression 1]]