<span>This characteristic of non-functions was noticed by I-don't-know-who, and was codified in "The Vertical Line Test": Given the graph of a relation, if you can draw a vertical line that crosses the graph in more than one place, then the relation is not a function.</span>
It is not proportional because the different weights of books have a different rate of change. Having a constant rate of change is something you need for a relationship to be proportional.
Hope this helps!
The probability is 1/5, or 20%.
Explanation there are only 2 numbers on the die divisible by 4, those being 4 and 8, therefore 2/10 which simplifies to 1/5 or 20% I hope this helps :)
Answer:
u subtract them
Step-by-step explanation: