Which equation represents a parabola that has a focus of (0,0) and a directix of y = 2?​

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

Which of the following is the graph of y= square root -x-3

An equation in slope-intersept form the lines that passes thought (-8,1) and is perpindicular to the y=2x-17.