


Cell Phone Algebra 

Assessment

Access billing information online from given websites
[Numbers 1, 2]
[_____/5 points]
5: Shows steps and clicks required to repeat access
3: Records web address only
1: Adds little or no detail to access steps
 Identify independent and dependent variables
[Numbers 5, 6]
[_____/5 points]
5: Correctly identifies and distinguishes independent from independent
variables
3: Identifies variables, with no clarity between independent and
dependent
1: Cannot distinguish between variables
 Record independent and dependent variables in a
table format
[Numbers 7, 8, 9, 10]
[_____/20 points
20: Thorough completion of tables in consistent formulaic manner
16: Partial though accurate completion of tables
12: Inconsistent data collection
8: Inconsistent variable use or identification
4: Incorrect recording of variable values
 Verbally describe the relationship between the
dependent and independent variable in a functional relationship
[Number 11d]
[_____/5 points]
5: Summarizes variable relationships clearly
3: Identifies variables and hints at relationships
1: Vaguely identifies relationship
 Use the problem solving steps to represent the
relationship between variables in an algebraic expression
[Number 11a,b,c,e,f]
[_____/10 points]
10: Thorough procedure outlining problem solving steps
8: Partial though accurate problem solving
6: Inconsistent explanation, i.e. no checking, etc.
4: Undocumented explanation
2: Incorrect application of problem solving steps
 Upon analyzing tabular data, determine the best
package of those examined
[Number 12]
[_____/5 points]
5: Summarizes plan choice conclusion and logic
3: Identifies best plan without explanation
1: Vaguely identifies best plan
TOTAL [_____/50 points]

