Equivalent expressions of functions
Verbal descriptions of equivalent expressions
|
Write two correspondence rules to describe each of the following stories.
Present the functions with the
Representation of Functions tool.
Explain what each correspondence rule describes and check whether your two correspondence rules are equivalent.
Explain how the numbers in the corrrespondence rules you have written relate to the situation described.
|
|
|
|
1. A pool is being emptied at a rate of 5 cubic meters per hour. It will be completely empty after 3 hours.
|
|
| 2. Elie received a sum of money for her birthday,
which she spent at a rate of $2 a day until she ran out of money, after 3 weeks.
|
|
|
3. Eric works at a store from 4 pm to 7 pm, 5 days a week. His hourly salary is
$4.
For the first two days Eric was an apprentice
and did not recieve any pay.
|
|
|
4. Robertson's Chocolate Shop sells chocolate
by weight, but you must buy at least 100
grams. The first 100 grams of choclate costs $2, and each
additional 100 grams costs $1.5.
|
|
|
5. The Beckman Chocolate Shop put up a sign: We sell 200 grams of chocolate at $5, and each additional 100 grams costs $2.
|
|
|
