Question

What is `absx`?

Answer 1

See below

Explanation:

(i) The absolute value of a number on the real line is its distance from `0` (irrespective of sign).

(ii) The absolute function returns the positive value of its argument, whether the argument is posivive or negative.

Examples:

(i) `abs(-4) = 4`

(ii) `abs(x) =`positive `x forall x in RR`

The graph of `y=abs(x)` below should help demonstrate the absolute function.

graph{absx [-9.88, 10.12, -1.76, 8.24]}