Clackamas Education Service District
Scoring Rubric: Mathematics Performance Task, Grade 8 - Amusement Park
Parts for Scoring
Points Possible
Problem 1
Match each ticket option listed in the chart with one of the graphs
below. Circle the letter of the graph that represents each of the ticket
options.
0
Did not attempt or 0 correct
1
1 correct answer
2
3 correct answers: Option #1 is Graph C, Option #2 is Graph A, and
Option #3 is Graph B.
Problem 2
Go back to the graphs on the previous page and connect the points for
Graph B and Graph C. Write the equation for each of the lines in the
chart below.
Problem 3
A. In the equation for Graph C, identify and describe what each
variable represents.
0
Did not attempt, or incorrect answer
1
1 correct answer
2
2 correct answers; Graph B y=18; Graph C y=2.5x
0
Did not attempt or both answers A and B are incorrect.
1
1 Partially correct; either answer A or answer B is correct.
2
0
2 correct answers; the variable x represents the number of ride
tickets and the variable y represents the cost. Graph C has a slope
of 2.5 and represents the cost increasing at a constant rate of $2.50
per ride ticket.
Did not attempt or both answers A and B are incorrect
1
Partially correct, either answer A or answer B is correct.
2
Correct answer for both A and B; (A. 6 rides; 120 minutes or 2 hours,
20r=120) and B. Equation is written and solved correctly (2.5r=18).
0
Did not attempt, or incorrect answer and incorrect inequalities.
1
Partially correct, accurate answer, but did not use equations or
inequalities to solve.
Uses an equation or inequality to solve; (e.g. Deluxe braceletminimum of 6 individual rides, 6+6+2.5x>25); Premium braceletminimum of 8 rides, 6+6+2.5x>40). Justifies answer including the
time factor. (6+6+2.5x>25 or 6+6+2.5x>40.”The ______bracelet is
the best deal for the two hours I will be at the amusement park
because ______”.
B. What is the slope of the line in Graph C? Interpret the slope for
Graph C.
Problem 4
In general, the wait time in line for each ride is 15 minutes. Each ride
then takes about 5 minutes to complete.
A. If you can only stay at the amusement park for two hours, how
many rides will you be able to take?
B. Write and solve an equation to determine how much time you
will need to spend at the amusement park to justify the
purchase of a Basic bracelet over the purchase of individual
tickets.
Problem 5
The amusement park offers other special deals and options for other
park attractions not included with the basic bracelet. Use the
information in the chart to solve the problem below.
Which bracelet option would be the best deal for the two hours you will
be at the amusement park? Write and solve an equation or inequality
to justify your choice and explain your answer.
Created by Curriculum, Instruction, & Evaluation (CIE) Services – Clackamas ESD, 2013 - 14
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