Which description is represented by a discrete graph

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air