Last year, 1800 music lovers heard the Toronto Symphony at a performance at Ontario Place. This year 2070 people heard them . What was the increase as a percentage of last year's attendance?

The cost varies directly with the number of tickets purchased. it costs $145 for 10 people to attend a concert. a. what is the constant of proportionality (k)? b. write the direct variation equation. c. home much does it cost for 8 people? d. graph this situation. be sure to label each axis and give the graph a title.