Can someone help please??

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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

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