Classify the real number. -81
Choose all that apply.
O irrational
O
rational
o
integer
O whole
O natural

Interger  and Real number

Step-by-step explanation:

Negative numbers: Real numbers that are less than zero. Because zero itself has no sign, neither the positive numbers nor the negative numbers include zero. When zero is a possibility, the following terms are often used: Non-negative numbers: Real numbers that are greater than or equal to zero.

The Different Types of Numbers are:

Natural Numbers Also known as the counting numbers, they include 1,2,3,4,5,6...

IntegersAll whole numbers, including negative numbers

Rational Numbers All integers, including fractions

Irrational Numbers Numbers that cannot be expressed as fractions, for example, pi

Real Numbers All numbers

SO, the answer is Interger  and Real nuber

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.