The distance of the point P(-4, 3) from the y-axis is

1. 5 units

2. -4 units

3. 4 units

4. 3 units

The distance between the point P(-4, 3) and y-axis can be determined by assuming a point A(0, 3) on y-axis.

By distance formula,

$\Rightarrow d = \sqrt{(x$2 - x1)^2 + (y2 - y1)^2} \\[1em] \Rightarrow AP = \sqrt{(-4 - 0)^2 + (3 - 3)^2} \\[1em] \Rightarrow AP = \sqrt{(-4)^2 + 0} \\[1em] \Rightarrow AP = \sqrt{16} \\[1em] \Rightarrow AP = 4 \text{ units}.

Hence, Option 3 is the correct option.