A medium sized chocolate cake at the local bakery costs $15. The table below shows the total cost for each number of cakes. 4) Total cost in dollars 82.5 75 67.5 60 52.5 45 37.5 30 22.5 15 7.5 0 y The points are now connected with a line, m. Find the slope of line m. 1 2 3 4 m 5 6 14 Number of cakes 7 8 9 10 Slope =