The River Town Shuttle provides a water taxi across the St. Johns River for $4 per ride. It has provided the following data concerning its costs of operating its water taxi January February March April 2,500 # of riders 4,200 4,100 May 2,600 $7,390 2,800 $8,120 $11,130 $11.225 $7,475 Operating costs a Use the high-low method to answer the following 1. Variable cost per rider 2. Fixed costs per month 3. Write the cost equation in good form How many water taxi customers does River Town need to generate a profit of $4 190 per month? b