Graph each equation in a rectangular coordinate system. f(x) = 1

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Identify the type of function: The given equation is f(x) = 1. This is a constant function, meaning the output value (y) is always 1, regardless of the input value (x).

Understand the graph of a constant function: A constant function is represented by a horizontal line on the graph because the y-value does not change as x changes.

Set up the rectangular coordinate system: Draw the x-axis (horizontal) and y-axis (vertical) on a graph. Label the axes and include a scale for both x and y values.

Plot points for the function: Since f(x) = 1, the y-value is always 1. Choose several x-values (e.g., -2, 0, 2) and plot the corresponding points (-2, 1), (0, 1), and (2, 1).

Draw the graph: Connect the plotted points with a straight horizontal line that extends infinitely in both directions. Label the line as f(x) = 1 to complete the graph.

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주요 개념

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Rectangular Coordinate System

A rectangular coordinate system, also known as the Cartesian coordinate system, consists of two perpendicular axes: the x-axis (horizontal) and the y-axis (vertical). Each point in this system is defined by an ordered pair (x, y), where 'x' represents the horizontal position and 'y' represents the vertical position. Understanding this system is crucial for graphing equations accurately.

Graphing Functions

Graphing functions involves plotting points that satisfy the function's equation on the coordinate system. For the function f(x) = 1, this means that for every value of 'x', the output 'f(x)' is always 1. This results in a horizontal line across the y-axis at y = 1, illustrating the concept of constant functions.

Horizontal Lines

A horizontal line in a coordinate system is characterized by having a constant y-value regardless of the x-value. In the case of the function f(x) = 1, the line will run parallel to the x-axis at the height of y = 1. Recognizing the properties of horizontal lines is essential for understanding how to represent constant functions graphically.