Question

According to the table, is the exam grade a function of the number of hours spent studying?
Responses
A Yes, it is a function because no one failed the test.Yes, it is a function because no one failed the test.
B Yes, it is a function because the student who studied more hours made the best grade.Yes, it is a function because the student who studied more hours made the best grade.
C Yes, it is a function because the exam grade increases by 2 points for each hour studied.Yes, it is a function because the exam grade increases by 2 points for each hour studied.
D No, it is not a function because the input value of 3 hours has 2 different output values of 78 and 82.No, it is not a function because the input value of 3 hours has 2 different output values of 78 and 82.

Answer 1

D. It's not a function because the input 3 hours corresponds to two different outputs (78 and 82), so an input does not have a single unique output.