16. A cost is $11,000 at 1,000 units, $12,000 at 2,000 units, and $13,000 at 3,000 units. Using the high-low method, how much is the fixed portion of these costs?

a. $1,000

b. $10,000

c. $20,000

d. The answer depends on the actual activity

19. Each point on the scattergraph represents one pair of

a. Cost and activity values

b. Variable cost and revenue values

c. Fixed cost and revenue values

d. Revenue and activity values

20. Which of the following methods provides the most accurate predictions of future costs?

a. Account analysis

b. Scattergraphs

c. High-low method

d. Regression analysis