<?php

$coordinates = [
    [0, 2],
    [2, 4],
    [4, 6]
];

$count = count($coordinates);
$x = $y = 0;

foreach( $coordinates as $coordinate ) {
    $x += $coordinate[0];
    $y += $coordinate[1];
}

$avgX = ceil( $x / $count );
$avgY = ceil( $y / $count );

echo "Average distance is: X: " . $avgX . ", Y: " . $avgY;

?>