MA 153 Lesson 26 Outline Review from last lesson:Parabolas:1. Standard Equation : 2()ya xhk=−+Vertex: ( ,)h k2. Quadratic form: 2yaxbxc=++Vertex can be found one of two ways: 1) The x-coordinate of the vertex is 2bxa= −. Substitute thex-coordinate (once known) into the equation to find they-coordinate. OR 2) Find the x-intercepts (by factoring). The x-coordinate of the vertex is always in the middle (the midpoint) of thex-intercepts or 122xxx+=. Again, substitute the x-coordinate (once known) into the equation to find the y-coordinate For both forms: “a” is the same number and tells you whether the parabola opens up or down. If , then the parabola opens up. 0a>If , then the parabola opens down. 0a<The minimum/maximum value = the y-coordinate of the vertex. Answering of homework questions over lesson 24.
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