The stem-and-leaf plot lists the ages of people in a movie theater. How many people in the movie theater are over the age of 30?
Enter your answer in the box. A stem-and-leaf plot with a stem value of 1 with a leaf value of 6, a stem value of 2 with a leaf value of 5, 6, a stem value of 3 with a leaf value of 8, a stem value of 4 with a leaf value of 0, 0, 0, 4, a stem value of 5, and a stem value of 6 with a leaf value of 7.
Your answer is -2 as the axis of symmetry is at -b/2a. So if you were to expand the equation, you would get y= x^2/4 +x -6 where b is 1 and 2a is ½ . Therefore -1 / ½ gives you -2