Mass.gov
Massachusetts Department of Elementary and Secondary Education
Go to Selected Program Area
Massachusetts State Seal
Students & Families Educators & Administrators Teaching, Learning & Testing Data & Accountability Finance & Funding About the Department Education Board  
>
>
>
>
 
 
 
 
 
 
 
 
 
 
>
>
>
>
>
>
>

Massachusetts Comprehensive Assessment System

2017, Grade 6 Mathematics

  Question 5: Constructed-Response no calculator allowed
This table shows the relationship between the number of pies sold at a farm and the total profit made, in dollars, from the pies sold at the farm.
Profit Made from Pies Sold. Number of Pies Sold, n; Profit made, p (dollars). Two; eight. Four; sixteen. Six; twenty four. Eight; thirty two.


Part A

Based on the table, what is the profit made, in dollars, from each pie sold at the farm? Show or explain how you got your answer.

Enter your answer and your work or explanation in the space provided.
equation editor preview


Part B

Write an equation that can be used to find p, the total profit made, in dollars, when n pies are sold at the farm.

Enter your equation in the space provided. Enter only your equation.
equation editor preview


Part C

Use the equation you wrote in Part B to calculate the profit made, in dollars, when 15 pies are sold at the farm. Show or explain how you got your answer.

Enter your answer and your work or explanation in the space provided.
equation editor preview


Part D

One day, the farm made a profit of $144 from the pies sold. How many pies were sold at the farm on that day? Show or explain how you got your answer.

Enter your answer and your work or explanation in the space provided.
equation editor preview

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 The student response demonstrates an exemplary understanding of the Expressions and Equations concepts involved in using variables to represent two quantities in a real-world problem that change in relationship to one another; and writing an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as the independent variable. The student writes an equation to represent the relationship between two quantities and uses the equation to calculate the value of one quantity, given the other.
4
3 The student response demonstrates a good understanding of the Expressions and Equations concepts involved in using variables to represent two quantities in a real-world problem that change in relationship to one another; and writing an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as the independent variable. Although there is significant evidence that the student was able to recognize and apply the concepts involved, some aspect of the response is flawed. As a result the response merits 3 points.
2 The student response demonstrates a fair understanding of the Expressions and Equations concepts involved in using variables to represent two quantities in a real-world problem that change in relationship to one another; and writing an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as the independent variable. While some aspects of the task are completed correctly, others are not. The mixed evidence provided by the student merits 2 points.
1 The student response demonstrates a minimal understanding of the Expressions and Equations concepts involved in using variables to represent two quantities in a real-world problem that change in relationship to one another; and writing an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as the independent variable.
0 The student response contains insufficient evidence of an understanding of the Expressions and Equations concepts involved in using variables to represent two quantities in a real-world problem that change in relationship to one another; and writing an equation to express one quantity, thought of as the dependent variable, in terms of the other quantity, thought of as the independent variable to merit any points.

Note: There are 2 sample student responses for Score Point 4.

Grade 6 Mathematics

Question 5: Expressions and Equations

Return to the MCAS 2017 Student Work Directory



Last Updated: November 30, 2016
E-mail this page| Print View| Print Pdf  
Massachusetts Department of Elementary and Secondary Education Search·Public Records Requests · A-Z Site Index · Policies · Site Info · Contact ESE