Q.What type of grapes are these?
We just bought a house that has grapes growing in the backyard and we are trying to figure out if they are edible.

Certified GKH Gardening Expert
It is hard to know what the exact type of grape it is, but it does appear to be a cultivated, edible variety. However, just to be sure, I would take a sample to your local extension office. There are a lot of look alikes in the plant world, many poisonous.
This article will help you to care for grape vines: https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm