The Graph of x^2
The graph of x^2 is a parabola. It is a curve that opens up or down, depending on the value of a in the equation y = ax^2 + bx + c.
Properties of the Graph of x^2
The graph of x^2 has the following properties:
- It is symmetrical about the x-axis.
- The vertex of the parabola is the point (h, k) where the graph changes direction.
- The axis of symmetry is the vertical line that passes through the vertex.
- The focus of the parabola is a point on the axis of symmetry, a distance p units away from the vertex.
- The directrix of the parabola is a horizontal line that passes through the focus, a distance p units below the vertex if the parabola opens up, or a distance p units above the vertex if the parabola opens down.
How to Graph x^2
To graph x^2, you can use the following steps:
- Find the vertex of the parabola.
- Find the axis of symmetry.
- Find the focus of the parabola.
- Find the directrix of the parabola.
- Plot the points that satisfy the equation y = ax^2 + bx + c.
Examples of Graphs of x^2
Here are some examples of graphs of x^2:
- y = x^2
The graph of y = x^2 is a parabola that opens up. The vertex of the parabola is (0, 0). The axis of symmetry is the x-axis. The focus of the parabola is (0, 1). The directrix of the parabola is the line y = -1.
[Image of Graph of y = x^2]- y = -x^2
The graph of y = -x^2 is a parabola that opens down. The vertex of the parabola is (0, 0). The axis of symmetry is the x-axis. The focus of the parabola is (0, -1). The directrix of the parabola is the line y = 1.
[Image of Graph of y = -x^2]- y = 2x^2
The graph of y = 2x^2 is a parabola that opens up. The vertex of the parabola is (0, 0). The axis of symmetry is the x-axis. The focus of the parabola is (0, 2). The directrix of the parabola is the line y = -2.
[Image of Graph of y = 2x^2]Questions about the Graph of x^2
Here are some questions about the graph of x^2:
- What is the equation of the graph of a parabola that opens up and has a vertex at (2, 3)?
- What is the vertex of the graph of y = 3x^2 – 2x + 1?
- What is the focus of the graph of y = -x^2 + 2x – 1?
- What is the directrix of the graph of y = 2x^2 – 3x + 4?
Answers to Questions about the Graph of x^2
- The equation of the graph of a parabola that opens up and has a vertex at (2, 3) is y = 2(x – 2)^2 + 3.
- The vertex of the graph of y = 3x^2 – 2x + 1 is (1, 1).
- The focus of the graph of y = -x^2 + 2x – 1 is (0, 1).
- The directrix of the graph of y = 2x^2 – 3x + 4 is the line y = -2.
Conclusion
The graph of x^2 is a parabola. It is a curve that opens up or down, depending on the value of a in the equation y = ax^2 + bx + c.