Identify the mathematical functions and their associated values.

Functions and Values:

• Function 1: \(f(x) = 1.5 - 3x\)
• Function 2: \(f(x) = 4.5 + x\)
• Function 3: \(f(x) = -\frac{x}{20}\)

Note: The text also contains the phrase 'Построить', which suggests a task to construct or graph these functions.