Linear or not linear, PLZ I’m freaking out cause this is due in like 15 mins PLEASE HELP ME

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

Which of the following parabolas opens down?

Can someone tell me if this is perpendicular? !