You and your friends are at the cinema. If tickets cost $10 each, write the amount (in dollars) that you will spend as a function of the number of tickets you buy. Let* t *represent one ticket, and* c* represent the total cost in dollars.

* c *= 10*t*

* c* = 10*t *+ 10

* c* = 10 -* t*

* c* =* t *+ 10