Price of lysine (per pound)

Quantity of lysine demanded (millions of pounds)

Total revenue (millions)

$12

  0

 $0

 11

 10

110

 10

 20

200

  9

 30

270

  8

 40

320

  7

 50

350

  6

 60

360

  5

 70

350

  4

 80

320

  3

 90

270

  2

100

200

  1

110

110

  0

120

  0