### Home > CCA > Chapter 11 > Lesson 11.3.4 > Problem11-121

11-121.

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This problem is a checkpoint for the quadratic web. It will be referred to as Checkpoint 11. Find the required missing part of the quadratic web. Homework Help ✎

1. Make an $x→y$ table and then draw a graph of                                                               $y=x^2−2x−3$.

1. Determine a possible equation for the given graph.

1. Without making an $x→y$ table, find the $x$-intercepts of this quadratic. Use them to find the vertex and then sketch a graph.                                      $y=x^2+8x+7$

1. The height in feet of a rocket after $x$ seconds is given by $y=128x−16x^2$. What is the maximum height reached by the rocket and how long does it take to reach that height?