Plz help me with this

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Is the point (0, 8) on the x-axis or y-axis? how do you know?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?