What is the equation of the following graph in vertex form? parabolic function going down from the left and turning at the point negative one comma zero and going up through the point zero comma one and continuing towards infinity

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.