Sure, let's analyze this question step-by-step to determine a reasonable value for the range given the number of hours you study for an exam impacts your grade.
First, consider each of the provided options:
1. 2.16: This value represents a small number. Considering the context that grades typically fall within a scale of 0 to 100, this does not seem to fit well in that range, as grades expressed in such precise decimal places are unusual.
2. 80: This value is within the common range of grades. Grades are typically measured on a scale from 0 to 100, or sometimes 0 to 4 (in GPA systems in some educational institutions). An 80 is a reasonable and common grade that falls into a standard grading scale.
3. -15: This value is unreasonable because grades and hours of study are generally not negative. You cannot study for negative hours, and negative grades are not typically used.
Given these observations:
- The value of 2.16 is uncommonly precise for a grading system.
- The value of -15 is not valid because grades and hours studied cannot be negative.
- The value of 80 falls within the common and expected range for grades.
Therefore, the most reasonable value for the range given is 80.
