Learn French: Ces régions auront une croissance lente. - These regions will have a slow growth.

Auront is the futur simple (will have). It is used here because this is a general prediction about the economy, which feels distant or theoretical. If you said vont avoir (futur proche - are going to have), it would sound like an immediate, highly certain event that is already visibly starting to happen.

Auront means "will have," but it doesn't look like the verb avoir. How is it formed?

Avoir (to have) is one of a few common verbs with an irregular base (or "stem") in the futur simple. Instead of using the full infinitive verb as the base, it uses aur-. Then, you add the standard "they" ending for the future tense (-ont), giving you auront.

Why is the adjective lente (slow) placed after croissance (growth)?

In French, most adjectives go after the noun they describe. Only a specific list of short, common adjectives (usually describing Beauty, Age, Number, Goodness, or Size) go before the noun. Because lente doesn't fall into those categories, it follows the standard rule and comes after croissance.

Since région is a feminine noun, shouldn't "these" be cettes?