How high off the ground is the hot air balloon?

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

If 25% of y is 30, what is 60% of y?