Item: tExtendArithmetic2c
Stem:
Extend the following sequence by giving the next two
terms:
4.00, 5.28, 6.56, 7.84, 9.12, . . .
Inputs:
- Enter your answers here:
- and
Key:
- Observable: 10.40,
11.68.
Score: 1;
Evidence Value: 1.
-
Student:Right! You correctly generated the next two terms in the arithmetic sequence.
-
Teacher:The student answered this item correctly. This item requires the student to generate successive terms in an arithmetic sequence. Since the sequence involves decimals, this contributes to the difficulty of this item.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. The sequence given in the problem, 4.00, 5.28, 6.56, 7.84, 9.12,. . . is an arithmetic sequence. In this case, there is a common difference of 1.28 between terms. To get any term, add 1.28 to the previous term.
-
Teacher:The student answered this item incorrectly. This item requires the student to generate successive terms in an arithmetic sequence. Since the sequence involves decimals, this contributes to the difficulty of this item.
Metadata:
Item Node: tExtendArithmetic2c,
Difficulty: 2.
Proficiencies: ExtendArithmetic.