The following table represents the number of tickets purchased at a movie theatre and the cost of purchase. # of Tickets Cost
2 $10
4 $20
6 $30
8 $40
The number of tickets purchased varies directly with the total cost of the purchase. Determine the constant of variation.

Michele wanted to measure the height of her school’s flagpole. she placed a mirror on the ground 48 feet from a flagpole, then walked backwards until she was able to see the top of the pole in the mirror. her eyes were 5 feet above the ground and she was 12 feet from the mirror. using similar triangles, find the height of the flagpole to the nearest hundredth of a foot.