Final answer:
In the context of absolute value equations, to complement the central value, c, you need a constant. The absolute value equation is then represented as |x - c| = Constants, which signifies that x is a certain constant distance from c.
Step-by-step explanation:
To write an absolute value equation, besides the central value, c, the second value you need is a constant that the absolute expression is equal to. One correct answer to fill in the blank would be: Option 4: |x - c| = Constants. The constant is the value that the absolute value of the expression is set to be equal to.
An absolute value equation of the form |x - c| = constant represents the distance from x to the central value c on the number line is some constant value. For example, if we have an equation |x - 5| = 3, this means that x is either 3 units away from 5 in the positive direction (x = 8) or in the negative direction (x = 2).