It depends on the site's authority and the relevance of your content. Generally, though, a high-quality backlink is worth a lot more than a low-quality one.
A backlink from an authoritative website is worth more than a backlink from a low-authority website. And a backlink from a website that's relevant to your content is worth more than a backlink from a website that's not relevant to your content.
So it really depends on the quality of the site's authority and relevance. But, in general, high-quality links are worth much more than low-quality links.