A graph of an equation is the set of all points that correspond to the ordered pairs that satisfy the equation. The greatest common factor is the largest quantity that is a factor of each of a group of quantities . An identity is an equation that is true for all replacement of the variable. When the identity element for addition, which is 0, is added to a number, the number is unchanged. An inconsistent system of equations is a system with no solutions.
Irrational number are nonrational numbers represented by points on the number line.
The smallest expression that is divisible by all denominators is called the least common denominator. If a graph is folded on its line of symmetry, the two sides match. A monomial is a polynomial with one term. The reciprocal of a number is also called the multiplicative inverse of the number. A negative number is located to the left of 0 on the number line.