9-4 Using Transformations to Graph Quadratic Functions ...
99-4-4
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Students will use vertex form to graph quadratic equations and describe transformations from the parent function with 70% accuracy. Students will use vertex form to graph quadratic functions and describe the transformations from
thHeolptaMrecnDt ofuungcatiloAnlwgeitbhr7a02% accuracy.
9-4
Using Transformations to Graph Quadratic Functions
If a parabola opens upward, it has a lowest point. If a parabola opens downward, it has a highest point. This lowest or highest point is the vertex of the parabola.
The parent function f(x) = x2 has its vertex at the origin. You can identify the vertex of other quadratic functions by analyzing the function in vertex form.
The vertex form of a quadratic function is f(x) = a(x ? h)2 + k, where a, h, and k are constants.
Students will use vertex form to graph quadratic functions and describe the transformations from thHeolptaMrecnDt ofuungcatiloAnlwgeitbhr7a02% accuracy.
9-4
Using Transformations to Graph Quadratic Functions
y = a(x - h)2 + k
? `h' (a number is inside parenthesis)
? Addition: moves left Subtraction: moves right
? `k' (a number is outside parenthesis)
? Addition: moves up Subtraction: moves down
? `a'
? Vertical stretch/shrink ? If negative, graph is reflected over x-axis (flipped)
Students will use vertex form to graph quadratic functions and describe the transformations from thHeolptaMrecnDt ofuungcatiloAnlwgeitbhr7a02% accuracy.
9-4
Using Transformations to Graph Quadratic Functions
Students will use vertex form to graph quadratic functions and describe the transformations from thHeolptaMrecnDt ofuungcatiloAnlwgeitbhr7a02% accuracy.
9-4
Using Transformations to Graph Quadratic Functions
Because the vertex is translated h horizontal units and k vertical from the origin, the vertex of the parabola is at (h, k).
Helpful Hint
When the quadratic parent function f(x) = x2 is written in vertex form, y = a(x ? h)2 + k, a = 1, h = 0, and k = 0.
Students will use vertex form to graph quadratic functions and describe the transformations from thHeolptaMrecnDt ofuungcatiloAnlwgeitbhr7a02% accuracy.
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