Item: tTableExtendGeometric1a
Stimulus:
| Term Number |
Term Value |
| 1 |
4 |
| 2 |
16 |
| 3 |
A |
| 4 |
B |
Stem:
The numbers in the table represent terms in a geometric sequence. Complete the table by filling in the values for A and B.
Inputs:
- Enter the value for A:
- Enter the value for B:
Key:
- Observable: 64,
256.
Score: 1;
Evidence Value: 1.
-
Student:Right!
-
Teacher:The student correctly generated the next two terms in a geometric sequence, when the sequence was presented in tabular format.
- Observable: 5,
6.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. You may have misread the question.
-
Teacher:The student did not correctly generate the next two terms in a geometric sequence, when the sequence was presented in tabular format. It is possible the student confused term number with term value.
- Observable: 28,
40.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. The first two terms in the sequence are from a geometric sequence, not from an arithmetic sequence.
-
Teacher:The student did not correctly generated the next two terms in a geometric sequence, when the sequence was presented in tabular format. It is possible the student confused the definition for a geometric sequence with the definition for an arithmetic sequence.
- Observable: 64,
1024.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. You may have been multiplying adjacent terms, instead of multiplying each term by the common ratio, 4.
-
Teacher:The student did not correctly generate the next two terms in a geometric sequence, when the sequence was presented in tabular format. The student may have multiplied adjacent terms.
- Observable: 20,
36.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. You may have been adding adjacent terms, instead of multiplying each term by the common ratio, 4.
-
Teacher:The student did not correctly generate the next two terms in a geometric sequence, when the sequence was presented in tabular format. The student may have added adjacent terms.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that was incorrect.
-
Teacher:The student got this item incorrect, but it is not clear why.
Metadata:
Item Node: tTableExtendGeometric1a,
Difficulty: 1.
Proficiencies: TableGeometric,
ExtendGeometric.