Interpolation of an array of values?

Question

Mathematics

An empty array of 100 elements is given.
Given a second array with values ​​for 170 elements.
It is necessary to transfer the data of the second array to the first by somehow averaging the data.
Tell me what algorithms to google linear interpolation? extrapolation? approximation?

Answer 1

For each Ai find the average of [Bi;B(i+70)].

Answer 2

according to the code, it's here:

$form_data = array(
        'fio' => array('Фамилия Имя Отчество', 'text', 300, 1),
        'tel' => array('Телефон', 'phone', 300, 1),
    );

you need to add something like
'captcha' => array('Каптча', 'keystring', 300, 1),