Graph ( f(x) = (x – 2)(x – 6) ). …

Mathematics Questions

Graph ​ f(x)=(x−2)(x−6) ​. Use the parabola tool then choose the vertex followed by one point on the parabola.

Short Answer

The function f(x) = (x – 2)(x – 6) is converted into vertex form f(x) = (x – 4)¬¨‚â§ – 4, identifying the vertex at (4, -4). The x-intercepts are (2, 0) and (6, 0), while the y-intercept is (0, 12), allowing for the complete graph of the parabola.

Step-by-Step Solution

Step 1: Convert the Function to Vertex Form

Start with the given function f(x) = (x – 2)(x – 6). Expand the equation by distributing the terms:

  • f(x) = x¬¨‚â§ – 6x – 2x + 12
  • Now combine like terms: f(x) = x¬¨‚â§ – 8x + 12
  • Next, complete the square to convert it into vertex form, leading to: f(x) = (x – 4)¬¨‚â§ – 4.

Step 2: Identify the Vertex of the Parabola

The vertex form of a parabola is expressed as g(x) = a(x – h)¬¨‚â§ + k, where (h, k) represents the vertex. For our function, compare it with the vertex form:

  • The vertex is (h, k) = (4, -4).
  • This gives us the coordinate of the vertex of the function.
  • Write down the vertex as: Vertex = (4, -4).

Step 3: Find the Intercepts and Graph the Function

To complete the graph, you’ll need to find the x-intercepts and y-intercept of the function. For the x-intercepts, set f(x) = 0 and solve:

  • 0 = (x – 4)¬¨‚â§ – 4
  • Solving gives x = 2 and x = 6, so x-intercepts are (2, 0) and (6, 0).
  • To find the y-intercept, substitute x = 0: f(0) = 12, resulting in the y-intercept (0, 12).

Finally, plot the points (2, 0), (6, 0), and (0, 12) on a graph and connect them with a curve to visualize the parabola.

Related Concepts

Function

A mathematical expression that relates an input to an output, often represented as f(x) and can take various forms, such as factored, expanded, or vertex form.

Vertex Form

A specific way of expressing a quadratic function that clearly indicates the vertex of the parabola, typically written as g(x) = a(x – h)¬¨‚â§ + k, where (h, k) is the vertex.

Intercepts

Points where a graph crosses the axes; the x-intercepts are points where the output is zero (f(x) = 0), and the y-intercept is the point where the input is zero (f(0)).

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