Which term describes a symbol that stands for a changing quantity in mathematics?

Which term describes a symbol that stands for a changing quantity in mathematics?

• A. Variable
• B. Equation
• C. Fraction
• D. Constant

Answer: (A)

A variable is a symbol that stands for a changing quantity in mathematics. This means it can take on different values depending on the situation, like x representing the number of apples you have today, which can change from day to day. A constant, by contrast, stays the same, so it wouldn’t change even if the situation changes. A fraction is simply a way to write part of a whole, and an equation is a statement that two expressions are equal. Using a variable lets us write general expressions like 3x + 2 or X/4 and solve for X when we have more information, because the value of the quantity the variable stands for isn’t fixed yet.

A variable is a symbol that stands for a changing quantity in mathematics. This means it can take on different values depending on the situation, like x representing the number of apples you have today, which can change from day to day. A constant, by contrast, stays the same, so it wouldn’t change even if the situation changes. A fraction is simply a way to write part of a whole, and an equation is a statement that two expressions are equal. Using a variable lets us write general expressions like 3x + 2 or X/4 and solve for X when we have more information, because the value of the quantity the variable stands for isn’t fixed yet.