Effect of 'a', 'b', 'c' on Quadratic Functions

Effect of 'a', 'b', 'c' on Quadratic Functions
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2020-05-06 17:39
This example demonstrates how parameters a, b, c in the quadratic function f(x) = ax² + bx + c affect the graph's orientation, vertex position, axis of symmetry, and intercepts with axes. Key math concepts include quadratic function graphs, parameter influence, vertex form vs. standard form, and coordinate geometry. GeoGebra commands like a, b, c, f, k, h, V, x1, x_{1}, x2, x_{2}, X1, standardform, vertexform, xinterceptform are used to construct the graph, vertex, axis of symmetry, and intercepts. Suitable for high school students learning quadratic function properties and parameter variations, or calculus curve sketching instruction.

GeoGebra Commands & Parameters

  1. Numeric a(1)
  2. Numeric b(0)
  3. Numeric c(0)
  4. y = (a * x^(2)) + (b * x) + c
  5. ((-b)) / ((2 * a))
  6. ((-b^(2))) / ((4 * a)) + c
  7. (k, h)
  8. ((1 / 2 * 1 / a) * ((-b) - sqrt(b^(2) - ((4 * a) * c))))
  9. (x1, 0)
  10. ((1 / 2 * 1 / a) * ((-b) + sqrt(b^(2) - ((4 * a) * c))))
  11. (x2, 0)
  12. Numeric X1(NaN)