Education Standards
OSPI Quadratic Instructional Task: Dress Shop
Overview
This resource was created by the Washington Office of Superintendent of Public Instruction.
Task
OSPI Quadratic Instructional Task J
Quadratics; Standard F-IF.2, Claim 2
Dress Shop
Dapper Dresses is a shop in the mall that sells a variety of classic clothing.
Emma finds out that the profit changes based on the price charged per dress. She tests out different selling prices for the shop’s most popular dress.
- Let represents the profit, in dollars.
- Let represent the price per dress, in dollars.
- Explain in words the meaning of the equation f as it relates to the graph. Be sure to include what means and what means.
- Explain in words the significance of in the context of the problem.
Rubric
Rubric
Question Number | Standard/Claim | Description |
J | F-IF.2/Claim 2
| A 2-point response demonstrates understanding of the standard and claim by doing the all of the following:
States represents the maximum profit. |
A 1-point response demonstrates limited understanding of the standard and/or claim by doing one of the following:
States represents the maximum profit. | ||
A 0-point response demonstrates almost no understanding of the standard and claim. |
OSPI Quadratic Instructional Task Annotated Student Work
OSPI Quadratic Instructional Task J Annotated Student Work
Example 1
2-point response: The student has stated that the profits are equal and that f(100) is the maximum amount of profit.
Example 2
1-point response: The student does not say that the amount of profit was the same when writing so does not earn Bullet 1. While is not “when” Emma made the maximum profit, this explanation stated most profit so earned Bullet 2.
Example 3
0-point response: does not referred to 50 dresses but to $50 dresses. Likewise, does not refer to “most” dresses but to $100 dresses. The bullets were not earned in either case.