8-2 Quadratic Functions (Part # 1)
Example 1
A) The vertex is (4,3) B) The vertex is (-3,-3)
Example 2 - Vertex Formula
a) y = 2x^2+4x we get the a, b, c in the formula y = ax^2 + bx + c a = 2 b ...
Example 3 + up/down test
up/down test opens upwards because a is Positive opens downward because a is Negative E...
Example 4 Graph f(x) = x^2 -2x - 8
Steps to Graph ax^2 + bx + c Find the vertex and the axis of symmetry. Sketch these in. Find ...
Example 5: Graph y = x^2 + 2x + 3
Find the vertex and the axis of symmetry. Sketch these in.• Find the x-intercept by plugging in 0...
Example 6: Graph y = 2x^2 - 8x
• Find the vertex and the axis of symmetry. Sketch these in.• Find the x-intercept by plugging in...
Example 7: h = 16t^2 + 72t + 520
Suppose a particular “star” is projected from a firework at a starting height of 520 feet with an...