Each of the charts below shows a relationship between costs or revenues $($on the vertical axis$)$ and

production volume $($on the horizontal axis$).$ This relationship is known as cost behavior.

Indicate which chart best fits the costs or situations described below and provide a short

explanation. Note that some charts may be used more than once and others never. Sometimes

two charts may fit one item, sometimes no chart may be appropriate.

Q$9\mathrm{.}1$

Direct material costs

Chart number:

Explanation:

Q$9\mathrm{.}2$

Supervisor$$s salary

Chart number:

Explanation:

Q$9\mathrm{.}3$

Electricity costs for a bread packing machine in a bakery

Chart number:

Explanation:

Q$9\mathrm{.}4$

Cost of raw materials charged at $$10$ per unit for the first $50$ units, $$7$ per unit for the next $50$ units, and $$4$ per unit for any additional units

Chart number:

Explanation:

Q$9\mathrm{.}5$

Electricity costs for a bakery based on a fixed annual charge plus a charge for every kWh $($kilowatt hour$)$ used

Chart number:

Explanation:

Q$9\mathrm{.}6$

Cost of a data transmission service that charges for the first $15,000$ minutes of use at a constant rate per minute and is free for any additional minutes of transmission time

Chart number:

Explanation: