Item: tExtendArithmetic3c

Stem:

Extend the following sequence by giving the next two terms: . . .

Inputs:

1. Enter your answers here:
2. and

Key:

• Observable: 13/2, 91/12. Score: 1; Evidence Value: 1.
  • Student:Right! You correctly generated the next two terms in the arithmetic sequence.
  • Teacher:The student got this item correct.
• Observable: . Score: 0; Evidence Value: 0.
  • Student:Sorry, that's incorrect. The sequence given in the problem, 13/12, 13/6, 13/4, 13/3, 65/12,... is an arithmetic sequence. In this case, there is a common difference of 13/12 between terms. To get any term, add 13/12 to the previous term.
  • Teacher:The student got this item incorrect.

Metadata: