The table below shows the total cost for purchasing a certain number of equally-priced concert tickets.
Total cost (in dollars) | Number of concert tickets
:-: | :-: |
$110$ | $2$
$275$ | $5$
$440$ | $8$
**Write an equation to describe the relationship between the total cost in dollars $(c)$ and the number of tickets purchased $(t)$.**
[[☃ expression 1]]