What are constants? Please give me an example...
3 answers
Constants are things that never change or aren't changed during experiments
BUT in math its A number with no variable
a constant is just a number, or a symbol for a value that does not change.
Variables, on the other hand, can assume any value as needed.
For example, if an item costs 2 dollars, then if you buy n items, you will spend
2n dollars. 2 is a constant. the price will not change. The number of items you buy may change depending on circumstances.
Notation conventions generally use letters early in the alphabet for constants (a-n) and later letters (p-z) for variables. So, if you see an equation like
y = 3kx + 4
it usually means the k is an unknown fixed value (constant), and x is a variable. x is independent, meaning you can choose any value you want, and y is dependent, in the sense that once x is chosen, you can obtain the value for y by multiplying x by 3k and adding 4. We may not know at once just what k's value is, but it will not change, no matter which value we choose for x.
Variables, on the other hand, can assume any value as needed.
For example, if an item costs 2 dollars, then if you buy n items, you will spend
2n dollars. 2 is a constant. the price will not change. The number of items you buy may change depending on circumstances.
Notation conventions generally use letters early in the alphabet for constants (a-n) and later letters (p-z) for variables. So, if you see an equation like
y = 3kx + 4
it usually means the k is an unknown fixed value (constant), and x is a variable. x is independent, meaning you can choose any value you want, and y is dependent, in the sense that once x is chosen, you can obtain the value for y by multiplying x by 3k and adding 4. We may not know at once just what k's value is, but it will not change, no matter which value we choose for x.