What is the axis of symmetry of the quadratic function y = -x2 + 6x + 4?​

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Put the equation in slope intercept form by solving for y