Compare your answers.

  1. Using the equation of the function , explain how the following information could be determined. Use the graph to verify your responses.

  • the x-intercepts

  • the y-intercept

  • the equation of the axis of symmetry

  • the coordinates of the vertex

  • the maximum or minimum value of the function

The function has a minimum because the GCF of 2 in is positive and thus the parabola opens up. The minimum value is y = −18.