Answer:
D. Negative slope
Step-by-step explanation:
Since it is a proportional relation, it must be linear. A line has a slope. Since it is decreasing, it is a negative slope.
Yes you should. When using a system
Let me give the significations following
natural numbers :ACA counting numbers the numbers you naturally say when counting.
whole numbers: include all natural numbers zero
Integers: include all whole numbers and their opposites.
Rational: can be written ASA fraction or ratio of two integers also decimals that terminate or repeat
Irrational: can not be written a fraction, decimals, do not terminate or repeat.
