D
I say D because high school has more specific schedules where in college there is more freedom with your schedule.
All the factors of 38 are 1, 2, 19, and 38.
The primes are 2 and 19.
The second largest prime factor is 2 .
Answer is c. (2,4)
Reason
(without seeing the graph)
With the same x value and a different y value the line will be straight up and down (vertical line) never crossing the y axis
Answer:
Digital x-rays require less time, reduce radiation, and are cheaper.
:)