1. Find the equation of the line through (-1,15) that is perpendicular to the [3] line y = {x - 2. 2. A company has a linear total cost function and has determined that it has a [7] total cost of $13,980 on sales of 6000 units. The same manufacturer has a total cost of $18620 on sales of 14,000 units. The selling price per unit is $1. a) Determine the revenue, cost and profit function using q for number of units. b) Find the break-even number of units. c) What is the break-even dollar volume