Item: tTableModelExplicitOtherRecursive3b
Stimulus:
The cost to rent a motorbike is given by the following formula:
Cost = ($3.50 x number of hours) + $3
| Time in Hours |
Cost in Dollars |
| 1 |
6.50 |
| 4 |
A |
| B |
24.00 |
Stem:
Fill in the values below for A and B from the table.
Inputs:
- Enter the value for A: $
- Enter the value for B:
hours
Key:
- Observable: 17,
6.
Score: 1;
Evidence Value: 1.
-
Student:Correct, good job!
-
Teacher:The student go this item correct.
- Observable: 17,
.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. You needed to fill in both values.
-
Teacher:Student didn't fill in both cells.
- Observable: ,
6.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not right. You needed to fill in both values.
-
Teacher:Student didn't fill in both cells.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. Since the formula is given in the problem, apply that instead of looking for a pattern in the numbers. To get value A, multiply the number of hours by the rate of $3.50 per hour, and add $3. Your result will be in dollars. To get the value for B, apply inverse operations in reverse order: First, subtract $3 from $24.00. Then divide this amount by the rate, $3.50 per hour. Your final result will be in hours.
-
Teacher:Not sure what the problem is.
Metadata:
Item Node: tTableModelExplicitOtherRecursive3b,
Difficulty: 3.
Proficiencies: ExplicitOtherRecursive,
TableOtherRecursive,
ModelOtherRecursive.