The correct answer corresponding to the given situation is:
c.
Yes, it is a function. Each numerical grade corresponds to one letter grade
It is given that:
The letter grade in this course is a function of your numerical grade.
i.e. corresponding to a numerical grade a letter grade is assigned.
Hence, corresponding to one numerical grade a single letter grade will be given.
This means that each element will have a unique image.
Hence, the given situation describes a function.
Hence, option C is true.
c.
Yes, it is a function. Each numerical grade corresponds to one letter grade